extensions/renderer/dispatcher.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/renderer/dispatcher.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "base/command_line.h"
  10 #include "base/debug/alias.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/metrics/histogram_macros.h"
  13 #include "base/metrics/user_metrics_action.h"
  14 #include "base/strings/string_piece.h"
  15 #include "base/strings/string_split.h"
  16 #include "base/strings/string_util.h"
  17 #include "base/time/time.h"
  18 #include "base/values.h"
  19 #include "content/grit/content_resources.h"
  20 #include "content/public/child/v8_value_converter.h"
  21 #include "content/public/common/content_switches.h"
  22 #include "content/public/common/url_constants.h"
  23 #include "content/public/renderer/render_thread.h"
  24 #include "content/public/renderer/render_view.h"
  25 #include "extensions/common/api/messaging/message.h"
  26 #include "extensions/common/constants.h"
  27 #include "extensions/common/extension.h"
  28 #include "extensions/common/extension_api.h"
  29 #include "extensions/common/extension_messages.h"
  30 #include "extensions/common/extension_urls.h"
  31 #include "extensions/common/feature_switch.h"
  32 #include "extensions/common/features/feature.h"
  33 #include "extensions/common/features/feature_provider.h"
  34 #include "extensions/common/manifest.h"
  35 #include "extensions/common/manifest_constants.h"
  36 #include "extensions/common/manifest_handlers/background_info.h"
  37 #include "extensions/common/manifest_handlers/content_capabilities_handler.h"
  38 #include "extensions/common/manifest_handlers/externally_connectable.h"
  39 #include "extensions/common/manifest_handlers/options_page_info.h"
  40 #include "extensions/common/manifest_handlers/sandboxed_page_info.h"
  41 #include "extensions/common/message_bundle.h"
  42 #include "extensions/common/permissions/permission_set.h"
  43 #include "extensions/common/permissions/permissions_data.h"
  44 #include "extensions/common/switches.h"
  45 #include "extensions/common/view_type.h"
  46 #include "extensions/renderer/api_activity_logger.h"
  47 #include "extensions/renderer/api_definitions_natives.h"
  48 #include "extensions/renderer/app_runtime_custom_bindings.h"
  49 #include "extensions/renderer/app_window_custom_bindings.h"
  50 #include "extensions/renderer/binding_generating_native_handler.h"
  51 #include "extensions/renderer/blob_native_handler.h"
  52 #include "extensions/renderer/content_watcher.h"
  53 #include "extensions/renderer/context_menus_custom_bindings.h"
  54 #include "extensions/renderer/css_native_handler.h"
  55 #include "extensions/renderer/dispatcher_delegate.h"
  56 #include "extensions/renderer/document_custom_bindings.h"
  57 #include "extensions/renderer/dom_activity_logger.h"
  58 #include "extensions/renderer/event_bindings.h"
  59 #include "extensions/renderer/extension_groups.h"
  60 #include "extensions/renderer/extension_helper.h"
  61 #include "extensions/renderer/extensions_renderer_client.h"
  62 #include "extensions/renderer/file_system_natives.h"
  63 #include "extensions/renderer/guest_view/guest_view_internal_custom_bindings.h"
  64 #include "extensions/renderer/i18n_custom_bindings.h"
  65 #include "extensions/renderer/id_generator_custom_bindings.h"
  66 #include "extensions/renderer/lazy_background_page_native_handler.h"
  67 #include "extensions/renderer/logging_native_handler.h"
  68 #include "extensions/renderer/messaging_bindings.h"
  69 #include "extensions/renderer/module_system.h"
  70 #include "extensions/renderer/print_native_handler.h"
  71 #include "extensions/renderer/process_info_native_handler.h"
  72 #include "extensions/renderer/render_view_observer_natives.h"
  73 #include "extensions/renderer/request_sender.h"
  74 #include "extensions/renderer/runtime_custom_bindings.h"
  75 #include "extensions/renderer/safe_builtins.h"
  76 #include "extensions/renderer/script_context.h"
  77 #include "extensions/renderer/script_context_set.h"
  78 #include "extensions/renderer/script_injection.h"
  79 #include "extensions/renderer/script_injection_manager.h"
  80 #include "extensions/renderer/send_request_natives.h"
  81 #include "extensions/renderer/set_icon_natives.h"
  82 #include "extensions/renderer/tab_finder.h"
  83 #include "extensions/renderer/test_features_native_handler.h"
  84 #include "extensions/renderer/user_gestures_native_handler.h"
  85 #include "extensions/renderer/utils_native_handler.h"
  86 #include "extensions/renderer/v8_context_native_handler.h"
  87 #include "grit/extensions_renderer_resources.h"
  88 #include "third_party/WebKit/public/platform/WebString.h"
  89 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  90 #include "third_party/WebKit/public/web/WebCustomElement.h"
  91 #include "third_party/WebKit/public/web/WebDataSource.h"
  92 #include "third_party/WebKit/public/web/WebDocument.h"
  93 #include "third_party/WebKit/public/web/WebFrame.h"
  94 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  95 #include "third_party/WebKit/public/web/WebScopedUserGesture.h"
  96 #include "third_party/WebKit/public/web/WebSecurityPolicy.h"
  97 #include "third_party/WebKit/public/web/WebView.h"
  98 #include "third_party/mojo/src/mojo/public/js/constants.h"
  99 #include "ui/base/layout.h"
 100 #include "ui/base/resource/resource_bundle.h"
 101 #include "v8/include/v8.h"
 102
 103 using base::UserMetricsAction;
 104 using blink::WebDataSource;
 105 using blink::WebDocument;
 106 using blink::WebFrame;
 107 using blink::WebScopedUserGesture;
 108 using blink::WebSecurityPolicy;
 109 using blink::WebString;
 110 using blink::WebVector;
 111 using blink::WebView;
 112 using content::RenderThread;
 113 using content::RenderView;
 114
 115 namespace extensions {
 116
 117 namespace {
 118
 119 static const int64 kInitialExtensionIdleHandlerDelayMs = 5 * 1000;
 120 static const int64 kMaxExtensionIdleHandlerDelayMs = 5 * 60 * 1000;
 121 static const char kEventDispatchFunction[] = "dispatchEvent";
 122 static const char kOnSuspendEvent[] = "runtime.onSuspend";
 123 static const char kOnSuspendCanceledEvent[] = "runtime.onSuspendCanceled";
 124
 125 // Returns the global value for "chrome" from |context|. If one doesn't exist
 126 // creates a new object for it.
 127 //
 128 // Note that this isn't necessarily an object, since webpages can write, for
 129 // example, "window.chrome = true".
 130 v8::Handle<v8::Value> GetOrCreateChrome(ScriptContext* context) {
 131   v8::Handle<v8::String> chrome_string(
 132       v8::String::NewFromUtf8(context->isolate(), "chrome"));
 133   v8::Handle<v8::Object> global(context->v8_context()->Global());
 134   v8::Handle<v8::Value> chrome(global->Get(chrome_string));
 135   if (chrome->IsUndefined()) {
 136     chrome = v8::Object::New(context->isolate());
 137     global->Set(chrome_string, chrome);
 138   }
 139   return chrome;
 140 }
 141
 142 // Returns |value| cast to an object if possible, else an empty handle.
 143 v8::Handle<v8::Object> AsObjectOrEmpty(v8::Handle<v8::Value> value) {
 144   return value->IsObject() ? value.As<v8::Object>() : v8::Handle<v8::Object>();
 145 }
 146
 147 // Calls a method |method_name| in a module |module_name| belonging to the
 148 // module system from |context|. Intended as a callback target from
 149 // ScriptContextSet::ForEach.
 150 void CallModuleMethod(const std::string& module_name,
 151                       const std::string& method_name,
 152                       const base::ListValue* args,
 153                       ScriptContext* context) {
 154   v8::HandleScope handle_scope(context->isolate());
 155   v8::Context::Scope context_scope(context->v8_context());
 156
 157   scoped_ptr<content::V8ValueConverter> converter(
 158       content::V8ValueConverter::create());
 159
 160   std::vector<v8::Handle<v8::Value> > arguments;
 161   for (base::ListValue::const_iterator it = args->begin(); it != args->end();
 162        ++it) {
 163     arguments.push_back(converter->ToV8Value(*it, context->v8_context()));
 164   }
 165
 166   context->module_system()->CallModuleMethod(
 167       module_name, method_name, &arguments);
 168 }
 169
 170 // This handles the "chrome." root API object in script contexts.
 171 class ChromeNativeHandler : public ObjectBackedNativeHandler {
 172  public:
 173   explicit ChromeNativeHandler(ScriptContext* context)
 174       : ObjectBackedNativeHandler(context) {
 175     RouteFunction(
 176         "GetChrome",
 177         base::Bind(&ChromeNativeHandler::GetChrome, base::Unretained(this)));
 178   }
 179
 180   void GetChrome(const v8::FunctionCallbackInfo<v8::Value>& args) {
 181     args.GetReturnValue().Set(GetOrCreateChrome(context()));
 182   }
 183 };
 184
 185 }  // namespace
 186
 187 Dispatcher::Dispatcher(DispatcherDelegate* delegate)
 188     : delegate_(delegate),
 189       content_watcher_(new ContentWatcher()),
 190       source_map_(&ResourceBundle::GetSharedInstance()),
 191       v8_schema_registry_(new V8SchemaRegistry),
 192       is_webkit_initialized_(false),
 193       user_script_set_manager_observer_(this),
 194       webrequest_used_(false) {
 195   const base::CommandLine& command_line =
 196       *(base::CommandLine::ForCurrentProcess());
 197   is_extension_process_ =
 198       command_line.HasSwitch(switches::kExtensionProcess) ||
 199       command_line.HasSwitch(::switches::kSingleProcess);
 200
 201   if (is_extension_process_) {
 202     RenderThread::Get()->SetIdleNotificationDelayInMs(
 203         kInitialExtensionIdleHandlerDelayMs);
 204   }
 205
 206   RenderThread::Get()->RegisterExtension(SafeBuiltins::CreateV8Extension());
 207
 208   user_script_set_manager_.reset(new UserScriptSetManager(&extensions_));
 209   script_injection_manager_.reset(
 210       new ScriptInjectionManager(&extensions_, user_script_set_manager_.get()));
 211   user_script_set_manager_observer_.Add(user_script_set_manager_.get());
 212   request_sender_.reset(new RequestSender(this));
 213   PopulateSourceMap();
 214 }
 215
 216 Dispatcher::~Dispatcher() {
 217 }
 218
 219 void Dispatcher::OnRenderViewCreated(content::RenderView* render_view) {
 220   script_injection_manager_->OnRenderViewCreated(render_view);
 221 }
 222
 223 bool Dispatcher::IsExtensionActive(const std::string& extension_id) const {
 224   bool is_active =
 225       active_extension_ids_.find(extension_id) != active_extension_ids_.end();
 226   if (is_active)
 227     CHECK(extensions_.Contains(extension_id));
 228   return is_active;
 229 }
 230
 231 const Extension* Dispatcher::GetExtensionFromFrameAndWorld(
 232     const WebFrame* frame,
 233     int world_id,
 234     bool use_effective_url) {
 235   std::string extension_id;
 236   if (world_id != 0) {
 237     // Isolated worlds (content script).
 238     extension_id = ScriptInjection::GetHostIdForIsolatedWorld(world_id);
 239   } else if (!frame->document().securityOrigin().isUnique()) {
 240     // TODO(kalman): Delete the above check.
 241
 242     // Extension pages (chrome-extension:// URLs).
 243     GURL frame_url = ScriptContext::GetDataSourceURLForFrame(frame);
 244     frame_url = ScriptContext::GetEffectiveDocumentURL(
 245         frame, frame_url, use_effective_url);
 246     extension_id = extensions_.GetExtensionOrAppIDByURL(frame_url);
 247   }
 248
 249   const Extension* extension = extensions_.GetByID(extension_id);
 250   if (!extension && !extension_id.empty()) {
 251     // There are conditions where despite a context being associated with an
 252     // extension, no extension actually gets found.  Ignore "invalid" because
 253     // CSP blocks extension page loading by switching the extension ID to
 254     // "invalid". This isn't interesting.
 255     if (extension_id != "invalid") {
 256       LOG(ERROR) << "Extension \"" << extension_id << "\" not found";
 257       RenderThread::Get()->RecordAction(
 258           UserMetricsAction("ExtensionNotFound_ED"));
 259     }
 260   }
 261   return extension;
 262 }
 263
 264 void Dispatcher::DidCreateScriptContext(
 265     WebFrame* frame,
 266     const v8::Handle<v8::Context>& v8_context,
 267     int extension_group,
 268     int world_id) {
 269   const base::TimeTicks start_time = base::TimeTicks::Now();
 270
 271   const Extension* extension =
 272       GetExtensionFromFrameAndWorld(frame, world_id, false);
 273   const Extension* effective_extension =
 274       GetExtensionFromFrameAndWorld(frame, world_id, true);
 275
 276   GURL frame_url = ScriptContext::GetDataSourceURLForFrame(frame);
 277   Feature::Context context_type =
 278       ClassifyJavaScriptContext(extension,
 279                                 extension_group,
 280                                 frame_url,
 281                                 frame->document().securityOrigin());
 282   Feature::Context effective_context_type = ClassifyJavaScriptContext(
 283       effective_extension,
 284       extension_group,
 285       ScriptContext::GetEffectiveDocumentURL(frame, frame_url, true),
 286       frame->document().securityOrigin());
 287
 288   ScriptContext* context =
 289       delegate_->CreateScriptContext(v8_context,
 290                                      frame,
 291                                      extension,
 292                                      context_type,
 293                                      effective_extension,
 294                                      effective_context_type).release();
 295   script_context_set_.Add(context);
 296
 297   // Initialize origin permissions for content scripts, which can't be
 298   // initialized in |OnActivateExtension|.
 299   if (context_type == Feature::CONTENT_SCRIPT_CONTEXT)
 300     InitOriginPermissions(extension);
 301
 302   {
 303     scoped_ptr<ModuleSystem> module_system(
 304         new ModuleSystem(context, &source_map_));
 305     context->set_module_system(module_system.Pass());
 306   }
 307   ModuleSystem* module_system = context->module_system();
 308
 309   // Enable natives in startup.
 310   ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system);
 311
 312   RegisterNativeHandlers(module_system, context);
 313
 314   // chrome.Event is part of the public API (although undocumented). Make it
 315   // lazily evalulate to Event from event_bindings.js. For extensions only
 316   // though, not all webpages!
 317   if (context->extension()) {
 318     v8::Handle<v8::Object> chrome = AsObjectOrEmpty(GetOrCreateChrome(context));
 319     if (!chrome.IsEmpty())
 320       module_system->SetLazyField(chrome, "Event", kEventBindings, "Event");
 321   }
 322
 323   UpdateBindingsForContext(context);
 324
 325   bool is_within_platform_app = IsWithinPlatformApp();
 326   // Inject custom JS into the platform app context.
 327   if (is_within_platform_app) {
 328     module_system->Require("platformApp");
 329   }
 330
 331   if (context->GetAvailability("appViewEmbedderInternal").is_available()) {
 332     module_system->Require("appView");
 333   } else if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
 334     module_system->Require("denyAppView");
 335   }
 336
 337   if (extensions::FeatureSwitch::surface_worker()->IsEnabled() &&
 338       context->GetAvailability("surfaceWorkerInternal").is_available()) {
 339     module_system->Require("surfaceWorker");
 340   }
 341
 342   if (context->GetAvailability("extensionViewInternal").is_available()) {
 343     module_system->Require("extensionView");
 344     module_system->Require("extensionViewApiMethods");
 345     module_system->Require("extensionViewAttributes");
 346   }
 347
 348   // Note: setting up the WebView class here, not the chrome.webview API.
 349   // The API will be automatically set up when first used.
 350   if (context->GetAvailability("webViewInternal").is_available()) {
 351     module_system->Require("webView");
 352     module_system->Require("webViewApiMethods");
 353     module_system->Require("webViewAttributes");
 354     if (context->GetAvailability("webViewExperimentalInternal")
 355             .is_available()) {
 356       module_system->Require("webViewExperimental");
 357     }
 358   } else if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
 359     module_system->Require("denyWebView");
 360   }
 361
 362   delegate_->RequireAdditionalModules(context, is_within_platform_app);
 363
 364   const base::TimeDelta elapsed = base::TimeTicks::Now() - start_time;
 365   switch (context_type) {
 366     case Feature::UNSPECIFIED_CONTEXT:
 367       UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_Unspecified",
 368                           elapsed);
 369       break;
 370     case Feature::BLESSED_EXTENSION_CONTEXT:
 371       UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_Blessed", elapsed);
 372       break;
 373     case Feature::UNBLESSED_EXTENSION_CONTEXT:
 374       UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_Unblessed",
 375                           elapsed);
 376       break;
 377     case Feature::CONTENT_SCRIPT_CONTEXT:
 378       UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_ContentScript",
 379                           elapsed);
 380       break;
 381     case Feature::WEB_PAGE_CONTEXT:
 382       UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_WebPage", elapsed);
 383       break;
 384     case Feature::BLESSED_WEB_PAGE_CONTEXT:
 385       UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_BlessedWebPage",
 386                           elapsed);
 387       break;
 388     case Feature::WEBUI_CONTEXT:
 389       UMA_HISTOGRAM_TIMES("Extensions.DidCreateScriptContext_WebUI", elapsed);
 390       break;
 391   }
 392
 393   VLOG(1) << "Num tracked contexts: " << script_context_set_.size();
 394 }
 395
 396 void Dispatcher::WillReleaseScriptContext(
 397     WebFrame* frame,
 398     const v8::Handle<v8::Context>& v8_context,
 399     int world_id) {
 400   ScriptContext* context = script_context_set_.GetByV8Context(v8_context);
 401   if (!context)
 402     return;
 403
 404   context->DispatchOnUnloadEvent();
 405   // TODO(kalman): add an invalidation observer interface to ScriptContext.
 406   request_sender_->InvalidateSource(context);
 407
 408   script_context_set_.Remove(context);
 409   VLOG(1) << "Num tracked contexts: " << script_context_set_.size();
 410 }
 411
 412 void Dispatcher::DidCreateDocumentElement(blink::WebFrame* frame) {
 413   // Note: use GetEffectiveDocumentURL not just frame->document()->url()
 414   // so that this also injects the stylesheet on about:blank frames that
 415   // are hosted in the extension process.
 416   GURL effective_document_url = ScriptContext::GetEffectiveDocumentURL(
 417       frame, frame->document().url(), true /* match_about_blank */);
 418
 419   const Extension* extension =
 420       extensions_.GetExtensionOrAppByURL(effective_document_url);
 421
 422   if (extension &&
 423       (extension->is_extension() || extension->is_platform_app())) {
 424     int resource_id = extension->is_platform_app() ? IDR_PLATFORM_APP_CSS
 425                                                    : IDR_EXTENSION_FONTS_CSS;
 426     std::string stylesheet = ResourceBundle::GetSharedInstance()
 427                                  .GetRawDataResource(resource_id)
 428                                  .as_string();
 429     ReplaceFirstSubstringAfterOffset(
 430         &stylesheet, 0, "$FONTFAMILY", system_font_family_);
 431     ReplaceFirstSubstringAfterOffset(
 432         &stylesheet, 0, "$FONTSIZE", system_font_size_);
 433
 434     // Blink doesn't let us define an additional user agent stylesheet, so
 435     // we insert the default platform app or extension stylesheet into all
 436     // documents that are loaded in each app or extension.
 437     frame->document().insertStyleSheet(WebString::fromUTF8(stylesheet));
 438   }
 439
 440   // If this is an extension options page, and the extension has opted into
 441   // using Chrome styles, then insert the Chrome extension stylesheet.
 442   if (extension && extension->is_extension() &&
 443       OptionsPageInfo::ShouldUseChromeStyle(extension) &&
 444       effective_document_url == OptionsPageInfo::GetOptionsPage(extension)) {
 445     frame->document().insertStyleSheet(
 446         WebString::fromUTF8(ResourceBundle::GetSharedInstance()
 447                                 .GetRawDataResource(IDR_EXTENSION_CSS)
 448                                 .as_string()));
 449   }
 450
 451   content_watcher_->DidCreateDocumentElement(frame);
 452 }
 453
 454 void Dispatcher::DidMatchCSS(
 455     blink::WebFrame* frame,
 456     const blink::WebVector<blink::WebString>& newly_matching_selectors,
 457     const blink::WebVector<blink::WebString>& stopped_matching_selectors) {
 458   content_watcher_->DidMatchCSS(
 459       frame, newly_matching_selectors, stopped_matching_selectors);
 460 }
 461
 462 void Dispatcher::OnExtensionResponse(int request_id,
 463                                      bool success,
 464                                      const base::ListValue& response,
 465                                      const std::string& error) {
 466   request_sender_->HandleResponse(request_id, success, response, error);
 467 }
 468
 469 bool Dispatcher::CheckContextAccessToExtensionAPI(
 470     const std::string& function_name,
 471     ScriptContext* context) const {
 472   if (!context) {
 473     DLOG(ERROR) << "Not in a v8::Context";
 474     return false;
 475   }
 476
 477   // Theoretically we could end up with bindings being injected into sandboxed
 478   // frames, for example content scripts. Don't let them execute API functions.
 479   blink::WebFrame* frame = context->web_frame();
 480   if (IsSandboxedPage(ScriptContext::GetDataSourceURLForFrame(frame))) {
 481     static const char kMessage[] =
 482         "%s cannot be used within a sandboxed frame.";
 483     std::string error_msg = base::StringPrintf(kMessage, function_name.c_str());
 484     context->isolate()->ThrowException(v8::Exception::Error(
 485         v8::String::NewFromUtf8(context->isolate(), error_msg.c_str())));
 486     return false;
 487   }
 488
 489   Feature::Availability availability = context->GetAvailability(function_name);
 490   if (!availability.is_available()) {
 491     context->isolate()->ThrowException(
 492         v8::Exception::Error(v8::String::NewFromUtf8(
 493             context->isolate(), availability.message().c_str())));
 494   }
 495
 496   return availability.is_available();
 497 }
 498
 499 void Dispatcher::DispatchEvent(const std::string& extension_id,
 500                                const std::string& event_name) const {
 501   base::ListValue args;
 502   args.Set(0, new base::StringValue(event_name));
 503   args.Set(1, new base::ListValue());
 504
 505   // Needed for Windows compilation, since kEventBindings is declared extern.
 506   const char* local_event_bindings = kEventBindings;
 507   script_context_set_.ForEach(extension_id,
 508                               base::Bind(&CallModuleMethod,
 509                                          local_event_bindings,
 510                                          kEventDispatchFunction,
 511                                          &args));
 512 }
 513
 514 void Dispatcher::InvokeModuleSystemMethod(content::RenderView* render_view,
 515                                           const std::string& extension_id,
 516                                           const std::string& module_name,
 517                                           const std::string& function_name,
 518                                           const base::ListValue& args,
 519                                           bool user_gesture) {
 520   scoped_ptr<WebScopedUserGesture> web_user_gesture;
 521   if (user_gesture)
 522     web_user_gesture.reset(new WebScopedUserGesture);
 523
 524   script_context_set_.ForEach(
 525       extension_id,
 526       render_view,
 527       base::Bind(&CallModuleMethod, module_name, function_name, &args));
 528
 529   // Reset the idle handler each time there's any activity like event or message
 530   // dispatch, for which Invoke is the chokepoint.
 531   if (is_extension_process_) {
 532     RenderThread::Get()->ScheduleIdleHandler(
 533         kInitialExtensionIdleHandlerDelayMs);
 534   }
 535
 536   // Tell the browser process when an event has been dispatched with a lazy
 537   // background page active.
 538   const Extension* extension = extensions_.GetByID(extension_id);
 539   if (extension && BackgroundInfo::HasLazyBackgroundPage(extension) &&
 540       module_name == kEventBindings &&
 541       function_name == kEventDispatchFunction) {
 542     RenderView* background_view =
 543         ExtensionHelper::GetBackgroundPage(extension_id);
 544     if (background_view) {
 545       int message_id;
 546       args.GetInteger(3, &message_id);
 547       background_view->Send(new ExtensionHostMsg_EventAck(
 548           background_view->GetRoutingID(), message_id));
 549     }
 550   }
 551 }
 552
 553 void Dispatcher::ClearPortData(int port_id) {
 554   // Only the target port side has entries in |port_to_tab_id_map_|. If
 555   // |port_id| is a source port, std::map::erase() will just silently fail
 556   // here as a no-op.
 557   port_to_tab_id_map_.erase(port_id);
 558 }
 559
 560 // static
 561 std::vector<std::pair<std::string, int> > Dispatcher::GetJsResources() {
 562   std::vector<std::pair<std::string, int> > resources;
 563
 564   // Libraries.
 565   resources.push_back(std::make_pair("appView", IDR_APP_VIEW_JS));
 566   resources.push_back(std::make_pair("denyAppView", IDR_APP_VIEW_DENY_JS));
 567   resources.push_back(std::make_pair("entryIdManager", IDR_ENTRY_ID_MANAGER));
 568   resources.push_back(std::make_pair(kEventBindings, IDR_EVENT_BINDINGS_JS));
 569   resources.push_back(std::make_pair("imageUtil", IDR_IMAGE_UTIL_JS));
 570   resources.push_back(std::make_pair("json_schema", IDR_JSON_SCHEMA_JS));
 571   resources.push_back(std::make_pair("lastError", IDR_LAST_ERROR_JS));
 572   resources.push_back(std::make_pair("messaging", IDR_MESSAGING_JS));
 573   resources.push_back(
 574       std::make_pair("messaging_utils", IDR_MESSAGING_UTILS_JS));
 575   resources.push_back(std::make_pair(kSchemaUtils, IDR_SCHEMA_UTILS_JS));
 576   resources.push_back(std::make_pair("sendRequest", IDR_SEND_REQUEST_JS));
 577   resources.push_back(std::make_pair("setIcon", IDR_SET_ICON_JS));
 578   resources.push_back(std::make_pair("test", IDR_TEST_CUSTOM_BINDINGS_JS));
 579   resources.push_back(
 580       std::make_pair("test_environment_specific_bindings",
 581                      IDR_BROWSER_TEST_ENVIRONMENT_SPECIFIC_BINDINGS_JS));
 582   resources.push_back(std::make_pair("uncaught_exception_handler",
 583                                      IDR_UNCAUGHT_EXCEPTION_HANDLER_JS));
 584   resources.push_back(std::make_pair("unload_event", IDR_UNLOAD_EVENT_JS));
 585   resources.push_back(std::make_pair("utils", IDR_UTILS_JS));
 586   resources.push_back(std::make_pair("webRequest",
 587                                      IDR_WEB_REQUEST_CUSTOM_BINDINGS_JS));
 588   resources.push_back(
 589        std::make_pair("webRequestInternal",
 590                       IDR_WEB_REQUEST_INTERNAL_CUSTOM_BINDINGS_JS));
 591   // Note: webView not webview so that this doesn't interfere with the
 592   // chrome.webview API bindings.
 593   resources.push_back(std::make_pair("guestView", IDR_GUEST_VIEW_JS));
 594   resources.push_back(std::make_pair("guestViewContainer",
 595                                      IDR_GUEST_VIEW_CONTAINER_JS));
 596   resources.push_back(std::make_pair("extensionView", IDR_EXTENSION_VIEW_JS));
 597   resources.push_back(std::make_pair("extensionViewApiMethods",
 598                                      IDR_EXTENSION_VIEW_API_METHODS_JS));
 599   resources.push_back(std::make_pair("extensionViewAttributes",
 600                                      IDR_EXTENSION_VIEW_ATTRIBUTES_JS));
 601   resources.push_back(std::make_pair("extensionViewConstants",
 602                                      IDR_EXTENSION_VIEW_CONSTANTS_JS));
 603   resources.push_back(std::make_pair("extensionViewEvents",
 604       IDR_EXTENSION_VIEW_EVENTS_JS));
 605   resources.push_back(std::make_pair(
 606       "extensionViewInternal", IDR_EXTENSION_VIEW_INTERNAL_CUSTOM_BINDINGS_JS));
 607   resources.push_back(std::make_pair("webView", IDR_WEB_VIEW_JS));
 608   resources.push_back(std::make_pair("surfaceWorker", IDR_SURFACE_VIEW_JS));
 609   resources.push_back(std::make_pair("webViewActionRequests",
 610                                      IDR_WEB_VIEW_ACTION_REQUESTS_JS));
 611   resources.push_back(std::make_pair("webViewApiMethods",
 612                                      IDR_WEB_VIEW_API_METHODS_JS));
 613   resources.push_back(std::make_pair("webViewAttributes",
 614                                      IDR_WEB_VIEW_ATTRIBUTES_JS));
 615   resources.push_back(std::make_pair("webViewConstants",
 616                                      IDR_WEB_VIEW_CONSTANTS_JS));
 617   resources.push_back(std::make_pair("webViewEvents", IDR_WEB_VIEW_EVENTS_JS));
 618   resources.push_back(
 619       std::make_pair("webViewExperimental", IDR_WEB_VIEW_EXPERIMENTAL_JS));
 620   resources.push_back(std::make_pair("webViewInternal",
 621                                      IDR_WEB_VIEW_INTERNAL_CUSTOM_BINDINGS_JS));
 622   resources.push_back(std::make_pair("denyWebView", IDR_WEB_VIEW_DENY_JS));
 623   resources.push_back(
 624       std::make_pair(mojo::kBindingsModuleName, IDR_MOJO_BINDINGS_JS));
 625   resources.push_back(
 626       std::make_pair(mojo::kBufferModuleName, IDR_MOJO_BUFFER_JS));
 627   resources.push_back(
 628       std::make_pair(mojo::kCodecModuleName, IDR_MOJO_CODEC_JS));
 629   resources.push_back(
 630       std::make_pair(mojo::kConnectionModuleName, IDR_MOJO_CONNECTION_JS));
 631   resources.push_back(
 632       std::make_pair(mojo::kConnectorModuleName, IDR_MOJO_CONNECTOR_JS));
 633   resources.push_back(
 634       std::make_pair(mojo::kRouterModuleName, IDR_MOJO_ROUTER_JS));
 635   resources.push_back(
 636       std::make_pair(mojo::kUnicodeModuleName, IDR_MOJO_UNICODE_JS));
 637   resources.push_back(
 638       std::make_pair(mojo::kValidatorModuleName, IDR_MOJO_VALIDATOR_JS));
 639   resources.push_back(std::make_pair("async_waiter", IDR_ASYNC_WAITER_JS));
 640   resources.push_back(std::make_pair("data_receiver", IDR_DATA_RECEIVER_JS));
 641   resources.push_back(std::make_pair("data_sender", IDR_DATA_SENDER_JS));
 642   resources.push_back(std::make_pair("keep_alive", IDR_KEEP_ALIVE_JS));
 643   resources.push_back(std::make_pair("extensions/common/mojo/keep_alive.mojom",
 644                                      IDR_KEEP_ALIVE_MOJOM_JS));
 645   resources.push_back(std::make_pair("device/serial/data_stream.mojom",
 646                                      IDR_DATA_STREAM_MOJOM_JS));
 647   resources.push_back(
 648       std::make_pair("device/serial/data_stream_serialization.mojom",
 649                      IDR_DATA_STREAM_SERIALIZATION_MOJOM_JS));
 650   resources.push_back(std::make_pair("stash_client", IDR_STASH_CLIENT_JS));
 651   resources.push_back(
 652       std::make_pair("extensions/common/mojo/stash.mojom", IDR_STASH_MOJOM_JS));
 653
 654   // Custom bindings.
 655   resources.push_back(
 656       std::make_pair("app.runtime", IDR_APP_RUNTIME_CUSTOM_BINDINGS_JS));
 657   resources.push_back(
 658       std::make_pair("app.window", IDR_APP_WINDOW_CUSTOM_BINDINGS_JS));
 659   resources.push_back(
 660       std::make_pair("declarativeWebRequest",
 661                      IDR_DECLARATIVE_WEBREQUEST_CUSTOM_BINDINGS_JS));
 662   resources.push_back(
 663       std::make_pair("contextMenus", IDR_CONTEXT_MENUS_CUSTOM_BINDINGS_JS));
 664   resources.push_back(
 665       std::make_pair("extension", IDR_EXTENSION_CUSTOM_BINDINGS_JS));
 666   resources.push_back(std::make_pair("i18n", IDR_I18N_CUSTOM_BINDINGS_JS));
 667   resources.push_back(std::make_pair(
 668       "mimeHandlerPrivate", IDR_MIME_HANDLER_PRIVATE_CUSTOM_BINDINGS_JS));
 669   resources.push_back(std::make_pair("extensions/common/api/mime_handler.mojom",
 670                                      IDR_MIME_HANDLER_MOJOM_JS));
 671   resources.push_back(
 672       std::make_pair("mojoPrivate", IDR_MOJO_PRIVATE_CUSTOM_BINDINGS_JS));
 673   resources.push_back(
 674       std::make_pair("permissions", IDR_PERMISSIONS_CUSTOM_BINDINGS_JS));
 675   resources.push_back(std::make_pair("printerProvider",
 676                                      IDR_PRINTER_PROVIDER_CUSTOM_BINDINGS_JS));
 677   resources.push_back(
 678       std::make_pair("runtime", IDR_RUNTIME_CUSTOM_BINDINGS_JS));
 679   resources.push_back(std::make_pair("windowControls", IDR_WINDOW_CONTROLS_JS));
 680   resources.push_back(
 681       std::make_pair("webViewRequest",
 682                      IDR_WEB_VIEW_REQUEST_CUSTOM_BINDINGS_JS));
 683   resources.push_back(std::make_pair("binding", IDR_BINDING_JS));
 684
 685   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 686           switches::kEnableMojoSerialService)) {
 687     resources.push_back(
 688         std::make_pair("serial", IDR_SERIAL_CUSTOM_BINDINGS_JS));
 689   }
 690   resources.push_back(std::make_pair("serial_service", IDR_SERIAL_SERVICE_JS));
 691   resources.push_back(
 692       std::make_pair("device/serial/serial.mojom", IDR_SERIAL_MOJOM_JS));
 693   resources.push_back(std::make_pair("device/serial/serial_serialization.mojom",
 694                                      IDR_SERIAL_SERIALIZATION_MOJOM_JS));
 695
 696   // Custom types sources.
 697   resources.push_back(std::make_pair("StorageArea", IDR_STORAGE_AREA_JS));
 698
 699   // Platform app sources that are not API-specific..
 700   resources.push_back(std::make_pair("platformApp", IDR_PLATFORM_APP_JS));
 701
 702   return resources;
 703 }
 704
 705 // NOTE: please use the naming convention "foo_natives" for these.
 706 // static
 707 void Dispatcher::RegisterNativeHandlers(ModuleSystem* module_system,
 708                                         ScriptContext* context,
 709                                         Dispatcher* dispatcher,
 710                                         RequestSender* request_sender,
 711                                         V8SchemaRegistry* v8_schema_registry) {
 712   module_system->RegisterNativeHandler(
 713       "chrome", scoped_ptr<NativeHandler>(new ChromeNativeHandler(context)));
 714   module_system->RegisterNativeHandler(
 715       "lazy_background_page",
 716       scoped_ptr<NativeHandler>(new LazyBackgroundPageNativeHandler(context)));
 717   module_system->RegisterNativeHandler(
 718       "logging", scoped_ptr<NativeHandler>(new LoggingNativeHandler(context)));
 719   module_system->RegisterNativeHandler("schema_registry",
 720                                        v8_schema_registry->AsNativeHandler());
 721   module_system->RegisterNativeHandler(
 722       "print", scoped_ptr<NativeHandler>(new PrintNativeHandler(context)));
 723   module_system->RegisterNativeHandler(
 724       "test_features",
 725       scoped_ptr<NativeHandler>(new TestFeaturesNativeHandler(context)));
 726   module_system->RegisterNativeHandler(
 727       "user_gestures",
 728       scoped_ptr<NativeHandler>(new UserGesturesNativeHandler(context)));
 729   module_system->RegisterNativeHandler(
 730       "utils", scoped_ptr<NativeHandler>(new UtilsNativeHandler(context)));
 731   module_system->RegisterNativeHandler(
 732       "v8_context",
 733       scoped_ptr<NativeHandler>(
 734           new V8ContextNativeHandler(context, dispatcher)));
 735   module_system->RegisterNativeHandler(
 736       "event_natives",
 737       scoped_ptr<NativeHandler>(new EventBindings(dispatcher, context)));
 738   module_system->RegisterNativeHandler(
 739       "messaging_natives",
 740       scoped_ptr<NativeHandler>(MessagingBindings::Get(dispatcher, context)));
 741   module_system->RegisterNativeHandler(
 742       "apiDefinitions",
 743       scoped_ptr<NativeHandler>(
 744           new ApiDefinitionsNatives(dispatcher, context)));
 745   module_system->RegisterNativeHandler(
 746       "sendRequest",
 747       scoped_ptr<NativeHandler>(
 748           new SendRequestNatives(request_sender, context)));
 749   module_system->RegisterNativeHandler(
 750       "setIcon",
 751       scoped_ptr<NativeHandler>(new SetIconNatives(context)));
 752   module_system->RegisterNativeHandler(
 753       "activityLogger",
 754       scoped_ptr<NativeHandler>(new APIActivityLogger(context)));
 755   module_system->RegisterNativeHandler(
 756       "renderViewObserverNatives",
 757       scoped_ptr<NativeHandler>(new RenderViewObserverNatives(context)));
 758
 759   // Natives used by multiple APIs.
 760   module_system->RegisterNativeHandler(
 761       "file_system_natives",
 762       scoped_ptr<NativeHandler>(new FileSystemNatives(context)));
 763
 764   // Custom bindings.
 765   module_system->RegisterNativeHandler(
 766       "app_runtime",
 767       scoped_ptr<NativeHandler>(new AppRuntimeCustomBindings(context)));
 768   module_system->RegisterNativeHandler(
 769       "app_window_natives",
 770       scoped_ptr<NativeHandler>(
 771           new AppWindowCustomBindings(dispatcher, context)));
 772   module_system->RegisterNativeHandler(
 773       "blob_natives",
 774       scoped_ptr<NativeHandler>(new BlobNativeHandler(context)));
 775   module_system->RegisterNativeHandler(
 776       "context_menus",
 777       scoped_ptr<NativeHandler>(new ContextMenusCustomBindings(context)));
 778   module_system->RegisterNativeHandler(
 779       "css_natives", scoped_ptr<NativeHandler>(new CssNativeHandler(context)));
 780   module_system->RegisterNativeHandler(
 781       "document_natives",
 782       scoped_ptr<NativeHandler>(new DocumentCustomBindings(context)));
 783   module_system->RegisterNativeHandler(
 784       "guest_view_internal",
 785       scoped_ptr<NativeHandler>(
 786           new GuestViewInternalCustomBindings(context)));
 787   module_system->RegisterNativeHandler(
 788       "i18n", scoped_ptr<NativeHandler>(new I18NCustomBindings(context)));
 789   module_system->RegisterNativeHandler(
 790       "id_generator",
 791       scoped_ptr<NativeHandler>(new IdGeneratorCustomBindings(context)));
 792   module_system->RegisterNativeHandler(
 793       "runtime", scoped_ptr<NativeHandler>(new RuntimeCustomBindings(context)));
 794 }
 795
 796 bool Dispatcher::OnControlMessageReceived(const IPC::Message& message) {
 797   bool handled = true;
 798   IPC_BEGIN_MESSAGE_MAP(Dispatcher, message)
 799   IPC_MESSAGE_HANDLER(ExtensionMsg_ActivateExtension, OnActivateExtension)
 800   IPC_MESSAGE_HANDLER(ExtensionMsg_CancelSuspend, OnCancelSuspend)
 801   IPC_MESSAGE_HANDLER(ExtensionMsg_DeliverMessage, OnDeliverMessage)
 802   IPC_MESSAGE_HANDLER(ExtensionMsg_DispatchOnConnect, OnDispatchOnConnect)
 803   IPC_MESSAGE_HANDLER(ExtensionMsg_DispatchOnDisconnect, OnDispatchOnDisconnect)
 804   IPC_MESSAGE_HANDLER(ExtensionMsg_Loaded, OnLoaded)
 805   IPC_MESSAGE_HANDLER(ExtensionMsg_MessageInvoke, OnMessageInvoke)
 806   IPC_MESSAGE_HANDLER(ExtensionMsg_SetChannel, OnSetChannel)
 807   IPC_MESSAGE_HANDLER(ExtensionMsg_SetFunctionNames, OnSetFunctionNames)
 808   IPC_MESSAGE_HANDLER(ExtensionMsg_SetScriptingWhitelist,
 809                       OnSetScriptingWhitelist)
 810   IPC_MESSAGE_HANDLER(ExtensionMsg_SetSystemFont, OnSetSystemFont)
 811   IPC_MESSAGE_HANDLER(ExtensionMsg_ShouldSuspend, OnShouldSuspend)
 812   IPC_MESSAGE_HANDLER(ExtensionMsg_Suspend, OnSuspend)
 813   IPC_MESSAGE_HANDLER(ExtensionMsg_TransferBlobs, OnTransferBlobs)
 814   IPC_MESSAGE_HANDLER(ExtensionMsg_Unloaded, OnUnloaded)
 815   IPC_MESSAGE_HANDLER(ExtensionMsg_UpdatePermissions, OnUpdatePermissions)
 816   IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateTabSpecificPermissions,
 817                       OnUpdateTabSpecificPermissions)
 818   IPC_MESSAGE_HANDLER(ExtensionMsg_ClearTabSpecificPermissions,
 819                       OnClearTabSpecificPermissions)
 820   IPC_MESSAGE_HANDLER(ExtensionMsg_UsingWebRequestAPI, OnUsingWebRequestAPI)
 821   IPC_MESSAGE_FORWARD(ExtensionMsg_WatchPages,
 822                       content_watcher_.get(),
 823                       ContentWatcher::OnWatchPages)
 824   IPC_MESSAGE_UNHANDLED(handled = false)
 825   IPC_END_MESSAGE_MAP()
 826
 827   return handled;
 828 }
 829
 830 void Dispatcher::WebKitInitialized() {
 831   // For extensions, we want to ensure we call the IdleHandler every so often,
 832   // even if the extension keeps up activity.
 833   if (is_extension_process_) {
 834     forced_idle_timer_.reset(new base::RepeatingTimer<content::RenderThread>);
 835     forced_idle_timer_->Start(
 836         FROM_HERE,
 837         base::TimeDelta::FromMilliseconds(kMaxExtensionIdleHandlerDelayMs),
 838         RenderThread::Get(),
 839         &RenderThread::IdleHandler);
 840   }
 841
 842   // Initialize host permissions for any extensions that were activated before
 843   // WebKit was initialized.
 844   for (std::set<std::string>::iterator iter = active_extension_ids_.begin();
 845        iter != active_extension_ids_.end();
 846        ++iter) {
 847     const Extension* extension = extensions_.GetByID(*iter);
 848     CHECK(extension);
 849
 850     InitOriginPermissions(extension);
 851   }
 852
 853   EnableCustomElementWhiteList();
 854
 855   is_webkit_initialized_ = true;
 856 }
 857
 858 void Dispatcher::IdleNotification() {
 859   if (is_extension_process_ && forced_idle_timer_) {
 860     // Dampen the forced delay as well if the extension stays idle for long
 861     // periods of time. (forced_idle_timer_ can be NULL after
 862     // OnRenderProcessShutdown has been called.)
 863     int64 forced_delay_ms =
 864         std::max(RenderThread::Get()->GetIdleNotificationDelayInMs(),
 865                  kMaxExtensionIdleHandlerDelayMs);
 866     forced_idle_timer_->Stop();
 867     forced_idle_timer_->Start(
 868         FROM_HERE,
 869         base::TimeDelta::FromMilliseconds(forced_delay_ms),
 870         RenderThread::Get(),
 871         &RenderThread::IdleHandler);
 872   }
 873 }
 874
 875 void Dispatcher::OnRenderProcessShutdown() {
 876   v8_schema_registry_.reset();
 877   forced_idle_timer_.reset();
 878 }
 879
 880 void Dispatcher::OnActivateExtension(const std::string& extension_id) {
 881   const Extension* extension = extensions_.GetByID(extension_id);
 882   if (!extension) {
 883     // Extension was activated but was never loaded. This probably means that
 884     // the renderer failed to load it (or the browser failed to tell us when it
 885     // did). Failures shouldn't happen, but instead of crashing there (which
 886     // executes on all renderers) be conservative and only crash in the renderer
 887     // of the extension which failed to load; this one.
 888     std::string& error = extension_load_errors_[extension_id];
 889     char minidump[256];
 890     base::debug::Alias(&minidump);
 891     base::snprintf(minidump,
 892                    arraysize(minidump),
 893                    "e::dispatcher:%s:%s",
 894                    extension_id.c_str(),
 895                    error.c_str());
 896     CHECK(extension) << extension_id << " was never loaded: " << error;
 897   }
 898
 899   active_extension_ids_.insert(extension_id);
 900
 901   // This is called when starting a new extension page, so start the idle
 902   // handler ticking.
 903   RenderThread::Get()->ScheduleIdleHandler(kInitialExtensionIdleHandlerDelayMs);
 904
 905   if (is_webkit_initialized_) {
 906     DOMActivityLogger::AttachToWorld(
 907         DOMActivityLogger::kMainWorldId, extension_id);
 908
 909     InitOriginPermissions(extension);
 910   }
 911
 912   UpdateActiveExtensions();
 913 }
 914
 915 void Dispatcher::OnCancelSuspend(const std::string& extension_id) {
 916   DispatchEvent(extension_id, kOnSuspendCanceledEvent);
 917 }
 918
 919 void Dispatcher::OnDeliverMessage(int target_port_id, const Message& message) {
 920   scoped_ptr<RequestSender::ScopedTabID> scoped_tab_id;
 921   std::map<int, int>::const_iterator it =
 922       port_to_tab_id_map_.find(target_port_id);
 923   if (it != port_to_tab_id_map_.end()) {
 924     scoped_tab_id.reset(
 925         new RequestSender::ScopedTabID(request_sender(), it->second));
 926   }
 927
 928   MessagingBindings::DeliverMessage(script_context_set_,
 929                                     target_port_id,
 930                                     message,
 931                                     NULL);  // All render frames.
 932 }
 933
 934 void Dispatcher::OnDispatchOnConnect(
 935     int target_port_id,
 936     const std::string& channel_name,
 937     const ExtensionMsg_TabConnectionInfo& source,
 938     const ExtensionMsg_ExternalConnectionInfo& info,
 939     const std::string& tls_channel_id) {
 940   DCHECK(!ContainsKey(port_to_tab_id_map_, target_port_id));
 941   DCHECK_EQ(1, target_port_id % 2);  // target renderer ports have odd IDs.
 942   int sender_tab_id = -1;
 943   source.tab.GetInteger("id", &sender_tab_id);
 944   port_to_tab_id_map_[target_port_id] = sender_tab_id;
 945
 946   MessagingBindings::DispatchOnConnect(script_context_set_,
 947                                        target_port_id,
 948                                        channel_name,
 949                                        source,
 950                                        info,
 951                                        tls_channel_id,
 952                                        NULL);  // All render frames.
 953 }
 954
 955 void Dispatcher::OnDispatchOnDisconnect(int port_id,
 956                                         const std::string& error_message) {
 957   MessagingBindings::DispatchOnDisconnect(script_context_set_,
 958                                           port_id,
 959                                           error_message,
 960                                           NULL);  // All render frames.
 961 }
 962
 963 void Dispatcher::OnLoaded(
 964     const std::vector<ExtensionMsg_Loaded_Params>& loaded_extensions) {
 965   std::vector<ExtensionMsg_Loaded_Params>::const_iterator i;
 966   for (i = loaded_extensions.begin(); i != loaded_extensions.end(); ++i) {
 967     std::string error;
 968     scoped_refptr<const Extension> extension = i->ConvertToExtension(&error);
 969     if (!extension.get()) {
 970       extension_load_errors_[i->id] = error;
 971       continue;
 972     }
 973     OnLoadedInternal(extension);
 974   }
 975   // Update the available bindings for all contexts. These may have changed if
 976   // an externally_connectable extension was loaded that can connect to an
 977   // open webpage.
 978   UpdateBindings("");
 979 }
 980
 981 void Dispatcher::OnLoadedInternal(scoped_refptr<const Extension> extension) {
 982   extensions_.Insert(extension);
 983 }
 984
 985 void Dispatcher::OnMessageInvoke(const std::string& extension_id,
 986                                  const std::string& module_name,
 987                                  const std::string& function_name,
 988                                  const base::ListValue& args,
 989                                  bool user_gesture) {
 990   InvokeModuleSystemMethod(
 991       NULL, extension_id, module_name, function_name, args, user_gesture);
 992 }
 993
 994 void Dispatcher::OnSetChannel(int channel) {
 995   delegate_->SetChannel(channel);
 996 }
 997
 998 void Dispatcher::OnSetFunctionNames(const std::vector<std::string>& names) {
 999   function_names_.clear();
1000   for (size_t i = 0; i < names.size(); ++i)
1001     function_names_.insert(names[i]);
1002 }
1003
1004 void Dispatcher::OnSetScriptingWhitelist(
1005     const ExtensionsClient::ScriptingWhitelist& extension_ids) {
1006   ExtensionsClient::Get()->SetScriptingWhitelist(extension_ids);
1007 }
1008
1009 void Dispatcher::OnSetSystemFont(const std::string& font_family,
1010                                  const std::string& font_size) {
1011   system_font_family_ = font_family;
1012   system_font_size_ = font_size;
1013 }
1014
1015 void Dispatcher::OnShouldSuspend(const std::string& extension_id,
1016                                  uint64 sequence_id) {
1017   RenderThread::Get()->Send(
1018       new ExtensionHostMsg_ShouldSuspendAck(extension_id, sequence_id));
1019 }
1020
1021 void Dispatcher::OnSuspend(const std::string& extension_id) {
1022   // Dispatch the suspend event. This doesn't go through the standard event
1023   // dispatch machinery because it requires special handling. We need to let
1024   // the browser know when we are starting and stopping the event dispatch, so
1025   // that it still considers the extension idle despite any activity the suspend
1026   // event creates.
1027   DispatchEvent(extension_id, kOnSuspendEvent);
1028   RenderThread::Get()->Send(new ExtensionHostMsg_SuspendAck(extension_id));
1029 }
1030
1031 void Dispatcher::OnTransferBlobs(const std::vector<std::string>& blob_uuids) {
1032   RenderThread::Get()->Send(new ExtensionHostMsg_TransferBlobsAck(blob_uuids));
1033 }
1034
1035 void Dispatcher::OnUnloaded(const std::string& id) {
1036   extensions_.Remove(id);
1037   active_extension_ids_.erase(id);
1038
1039   // If the extension is later reloaded with a different set of permissions,
1040   // we'd like it to get a new isolated world ID, so that it can pick up the
1041   // changed origin whitelist.
1042   ScriptInjection::RemoveIsolatedWorld(id);
1043
1044   // Invalidate all of the contexts that were removed.
1045   // TODO(kalman): add an invalidation observer interface to ScriptContext.
1046   ScriptContextSet::ContextSet removed_contexts =
1047       script_context_set_.OnExtensionUnloaded(id);
1048   for (ScriptContextSet::ContextSet::iterator it = removed_contexts.begin();
1049        it != removed_contexts.end();
1050        ++it) {
1051     request_sender_->InvalidateSource(*it);
1052   }
1053
1054   // Update the available bindings for the remaining contexts. These may have
1055   // changed if an externally_connectable extension is unloaded and a webpage
1056   // is no longer accessible.
1057   UpdateBindings("");
1058
1059   // Invalidates the messages map for the extension in case the extension is
1060   // reloaded with a new messages map.
1061   EraseL10nMessagesMap(id);
1062
1063   // We don't do anything with existing platform-app stylesheets. They will
1064   // stay resident, but the URL pattern corresponding to the unloaded
1065   // extension's URL just won't match anything anymore.
1066 }
1067
1068 void Dispatcher::OnUpdatePermissions(
1069     const ExtensionMsg_UpdatePermissions_Params& params) {
1070   const Extension* extension = extensions_.GetByID(params.extension_id);
1071   if (!extension)
1072     return;
1073
1074   scoped_refptr<const PermissionSet> active =
1075       params.active_permissions.ToPermissionSet();
1076   scoped_refptr<const PermissionSet> withheld =
1077       params.withheld_permissions.ToPermissionSet();
1078
1079   if (is_webkit_initialized_) {
1080     UpdateOriginPermissions(
1081         extension->url(),
1082         extension->permissions_data()->GetEffectiveHostPermissions(),
1083         active->effective_hosts());
1084   }
1085
1086   extension->permissions_data()->SetPermissions(active, withheld);
1087   UpdateBindings(extension->id());
1088 }
1089
1090 void Dispatcher::OnUpdateTabSpecificPermissions(const GURL& visible_url,
1091                                                 const std::string& extension_id,
1092                                                 const URLPatternSet& new_hosts,
1093                                                 bool update_origin_whitelist,
1094                                                 int tab_id) {
1095   // Check against the URL to avoid races. If we can't find the tab, it's
1096   // because this is an extension's background page (run in a different
1097   // process) - in this case, we can't perform the security check. However,
1098   // since activeTab is only granted via user action, this isn't a huge concern.
1099   content::RenderView* render_view = TabFinder::Find(tab_id);
1100   if (render_view &&
1101       render_view->GetWebView()->mainFrame()->document().url() != visible_url) {
1102     return;
1103   }
1104
1105   const Extension* extension = extensions_.GetByID(extension_id);
1106   if (!extension)
1107     return;
1108
1109   URLPatternSet old_effective =
1110       extension->permissions_data()->GetEffectiveHostPermissions();
1111   extension->permissions_data()->UpdateTabSpecificPermissions(
1112       tab_id,
1113       new extensions::PermissionSet(extensions::APIPermissionSet(),
1114                                     extensions::ManifestPermissionSet(),
1115                                     new_hosts,
1116                                     extensions::URLPatternSet()));
1117
1118   if (is_webkit_initialized_ && update_origin_whitelist) {
1119     UpdateOriginPermissions(
1120         extension->url(),
1121         old_effective,
1122         extension->permissions_data()->GetEffectiveHostPermissions());
1123   }
1124 }
1125
1126 void Dispatcher::OnClearTabSpecificPermissions(
1127     const std::vector<std::string>& extension_ids,
1128     bool update_origin_whitelist,
1129     int tab_id) {
1130   for (const std::string& id : extension_ids) {
1131     const Extension* extension = extensions_.GetByID(id);
1132     if (extension) {
1133       URLPatternSet old_effective =
1134           extension->permissions_data()->GetEffectiveHostPermissions();
1135       extension->permissions_data()->ClearTabSpecificPermissions(tab_id);
1136       if (is_webkit_initialized_ && update_origin_whitelist) {
1137         UpdateOriginPermissions(
1138             extension->url(),
1139             old_effective,
1140             extension->permissions_data()->GetEffectiveHostPermissions());
1141       }
1142     }
1143   }
1144 }
1145
1146 void Dispatcher::OnUsingWebRequestAPI(bool webrequest_used) {
1147   webrequest_used_ = webrequest_used;
1148 }
1149
1150 void Dispatcher::OnUserScriptsUpdated(
1151       const std::set<std::string>& changed_extensions,
1152       const std::vector<UserScript*>& scripts) {
1153   UpdateActiveExtensions();
1154 }
1155
1156 void Dispatcher::UpdateActiveExtensions() {
1157   std::set<std::string> active_extensions = active_extension_ids_;
1158   user_script_set_manager_->GetAllActiveExtensionIds(&active_extensions);
1159   delegate_->OnActiveExtensionsUpdated(active_extensions);
1160 }
1161
1162 void Dispatcher::InitOriginPermissions(const Extension* extension) {
1163   delegate_->InitOriginPermissions(extension,
1164                                    IsExtensionActive(extension->id()));
1165   UpdateOriginPermissions(
1166       extension->url(),
1167       URLPatternSet(),  // No old permissions.
1168       extension->permissions_data()->GetEffectiveHostPermissions());
1169 }
1170
1171 void Dispatcher::UpdateOriginPermissions(const GURL& extension_url,
1172                                          const URLPatternSet& old_patterns,
1173                                          const URLPatternSet& new_patterns) {
1174   static const char* kSchemes[] = {
1175     url::kHttpScheme,
1176     url::kHttpsScheme,
1177     url::kFileScheme,
1178     content::kChromeUIScheme,
1179     url::kFtpScheme,
1180 #if defined(OS_CHROMEOS)
1181     content::kExternalFileScheme,
1182 #endif
1183   };
1184   for (size_t i = 0; i < arraysize(kSchemes); ++i) {
1185     const char* scheme = kSchemes[i];
1186     // Remove all old patterns...
1187     for (URLPatternSet::const_iterator pattern = old_patterns.begin();
1188          pattern != old_patterns.end(); ++pattern) {
1189       if (pattern->MatchesScheme(scheme)) {
1190         WebSecurityPolicy::removeOriginAccessWhitelistEntry(
1191             extension_url,
1192             WebString::fromUTF8(scheme),
1193             WebString::fromUTF8(pattern->host()),
1194             pattern->match_subdomains());
1195       }
1196     }
1197     // ...And add the new ones.
1198     for (URLPatternSet::const_iterator pattern = new_patterns.begin();
1199          pattern != new_patterns.end(); ++pattern) {
1200       if (pattern->MatchesScheme(scheme)) {
1201         WebSecurityPolicy::addOriginAccessWhitelistEntry(
1202             extension_url,
1203             WebString::fromUTF8(scheme),
1204             WebString::fromUTF8(pattern->host()),
1205             pattern->match_subdomains());
1206       }
1207     }
1208   }
1209 }
1210
1211 void Dispatcher::EnableCustomElementWhiteList() {
1212   blink::WebCustomElement::addEmbedderCustomElementName("appview");
1213   blink::WebCustomElement::addEmbedderCustomElementName("appviewbrowserplugin");
1214   blink::WebCustomElement::addEmbedderCustomElementName("extensionoptions");
1215   blink::WebCustomElement::addEmbedderCustomElementName(
1216       "extensionoptionsbrowserplugin");
1217   blink::WebCustomElement::addEmbedderCustomElementName("extensionview");
1218   blink::WebCustomElement::addEmbedderCustomElementName(
1219       "extensionviewbrowserplugin");
1220   blink::WebCustomElement::addEmbedderCustomElementName("webview");
1221   blink::WebCustomElement::addEmbedderCustomElementName("webviewbrowserplugin");
1222   blink::WebCustomElement::addEmbedderCustomElementName("surfaceview");
1223   blink::WebCustomElement::addEmbedderCustomElementName(
1224       "surfaceviewbrowserplugin");
1225 }
1226
1227 void Dispatcher::UpdateBindings(const std::string& extension_id) {
1228   script_context_set().ForEach(extension_id,
1229                                base::Bind(&Dispatcher::UpdateBindingsForContext,
1230                                           base::Unretained(this)));
1231 }
1232
1233 void Dispatcher::UpdateBindingsForContext(ScriptContext* context) {
1234   v8::HandleScope handle_scope(context->isolate());
1235   v8::Context::Scope context_scope(context->v8_context());
1236
1237   // TODO(kalman): Make the bindings registration have zero overhead then run
1238   // the same code regardless of context type.
1239   switch (context->context_type()) {
1240     case Feature::UNSPECIFIED_CONTEXT:
1241     case Feature::WEB_PAGE_CONTEXT:
1242     case Feature::BLESSED_WEB_PAGE_CONTEXT:
1243       // Web page context; it's too expensive to run the full bindings code.
1244       // Hard-code that the app and webstore APIs are available...
1245       if (context->GetAvailability("app").is_available())
1246         RegisterBinding("app", context);
1247       if (context->GetAvailability("webstore").is_available())
1248         RegisterBinding("webstore", context);
1249       if (IsRuntimeAvailableToContext(context))
1250         RegisterBinding("runtime", context);
1251       UpdateContentCapabilities(context);
1252       break;
1253
1254     case Feature::BLESSED_EXTENSION_CONTEXT:
1255     case Feature::UNBLESSED_EXTENSION_CONTEXT:
1256     case Feature::CONTENT_SCRIPT_CONTEXT:
1257     case Feature::WEBUI_CONTEXT: {
1258       // Extension context; iterate through all the APIs and bind the available
1259       // ones.
1260       const FeatureProvider* api_feature_provider =
1261           FeatureProvider::GetAPIFeatures();
1262       const std::vector<std::string>& apis =
1263           api_feature_provider->GetAllFeatureNames();
1264       for (std::vector<std::string>::const_iterator it = apis.begin();
1265            it != apis.end();
1266            ++it) {
1267         const std::string& api_name = *it;
1268         Feature* feature = api_feature_provider->GetFeature(api_name);
1269         DCHECK(feature);
1270
1271         // Internal APIs are included via require(api_name) from internal code
1272         // rather than chrome[api_name].
1273         if (feature->IsInternal())
1274           continue;
1275
1276         // If this API has a parent feature (and isn't marked 'noparent'),
1277         // then this must be a function or event, so we should not register.
1278         if (api_feature_provider->GetParent(feature) != NULL)
1279           continue;
1280
1281         // Skip chrome.test if this isn't a test.
1282         if (api_name == "test" &&
1283             !base::CommandLine::ForCurrentProcess()->HasSwitch(
1284                 ::switches::kTestType)) {
1285           continue;
1286         }
1287
1288         if (context->IsAnyFeatureAvailableToContext(*feature))
1289           RegisterBinding(api_name, context);
1290       }
1291       break;
1292     }
1293   }
1294 }
1295
1296 void Dispatcher::RegisterBinding(const std::string& api_name,
1297                                  ScriptContext* context) {
1298   std::string bind_name;
1299   v8::Handle<v8::Object> bind_object =
1300       GetOrCreateBindObjectIfAvailable(api_name, &bind_name, context);
1301
1302   // Empty if the bind object failed to be created, probably because the
1303   // extension overrode chrome with a non-object, e.g. window.chrome = true.
1304   if (bind_object.IsEmpty())
1305     return;
1306
1307   v8::Local<v8::String> v8_bind_name =
1308       v8::String::NewFromUtf8(context->isolate(), bind_name.c_str());
1309   if (bind_object->HasRealNamedProperty(v8_bind_name)) {
1310     // The bind object may already have the property if the API has been
1311     // registered before (or if the extension has put something there already,
1312     // but, whatevs).
1313     //
1314     // In the former case, we need to re-register the bindings for the APIs
1315     // which the extension now has permissions for (if any), but not touch any
1316     // others so that we don't destroy state such as event listeners.
1317     //
1318     // TODO(kalman): Only register available APIs to make this all moot.
1319     if (bind_object->HasRealNamedCallbackProperty(v8_bind_name))
1320       return;  // lazy binding still there, nothing to do
1321     if (bind_object->Get(v8_bind_name)->IsObject())
1322       return;  // binding has already been fully installed
1323   }
1324
1325   ModuleSystem* module_system = context->module_system();
1326   if (!source_map_.Contains(api_name)) {
1327     module_system->RegisterNativeHandler(
1328         api_name,
1329         scoped_ptr<NativeHandler>(new BindingGeneratingNativeHandler(
1330             module_system, api_name, "binding")));
1331     module_system->SetNativeLazyField(
1332         bind_object, bind_name, api_name, "binding");
1333   } else {
1334     module_system->SetLazyField(bind_object, bind_name, api_name, "binding");
1335   }
1336 }
1337
1338 // NOTE: please use the naming convention "foo_natives" for these.
1339 void Dispatcher::RegisterNativeHandlers(ModuleSystem* module_system,
1340                                         ScriptContext* context) {
1341   RegisterNativeHandlers(module_system,
1342                          context,
1343                          this,
1344                          request_sender_.get(),
1345                          v8_schema_registry_.get());
1346   const Extension* extension = context->extension();
1347   int manifest_version = extension ? extension->manifest_version() : 1;
1348   bool is_component_extension =
1349       extension && Manifest::IsComponentLocation(extension->location());
1350   bool send_request_disabled =
1351       (extension && Manifest::IsUnpackedLocation(extension->location()) &&
1352        BackgroundInfo::HasLazyBackgroundPage(extension));
1353   module_system->RegisterNativeHandler(
1354       "process",
1355       scoped_ptr<NativeHandler>(new ProcessInfoNativeHandler(
1356           context,
1357           context->GetExtensionID(),
1358           context->GetContextTypeDescription(),
1359           ExtensionsRendererClient::Get()->IsIncognitoProcess(),
1360           is_component_extension,
1361           manifest_version,
1362           send_request_disabled)));
1363
1364   delegate_->RegisterNativeHandlers(this, module_system, context);
1365 }
1366
1367 bool Dispatcher::IsRuntimeAvailableToContext(ScriptContext* context) {
1368   if (extensions::FeatureSwitch::surface_worker()->IsEnabled() &&
1369       context->GetAvailability("surfaceWorkerInternal").is_available()) {
1370     return true;
1371   }
1372   for (const auto& extension : extensions_) {
1373     ExternallyConnectableInfo* info = static_cast<ExternallyConnectableInfo*>(
1374         extension->GetManifestData(manifest_keys::kExternallyConnectable));
1375     if (info && info->matches.MatchesURL(context->GetURL()))
1376       return true;
1377   }
1378   return false;
1379 }
1380
1381 void Dispatcher::UpdateContentCapabilities(ScriptContext* context) {
1382   APIPermissionSet permissions;
1383   for (const auto& extension : extensions_) {
1384     const ContentCapabilitiesInfo& info =
1385         ContentCapabilitiesInfo::Get(extension.get());
1386     if (info.url_patterns.MatchesURL(context->GetURL())) {
1387       APIPermissionSet new_permissions;
1388       APIPermissionSet::Union(permissions, info.permissions, &new_permissions);
1389       permissions = new_permissions;
1390     }
1391   }
1392   context->SetContentCapabilities(permissions);
1393 }
1394
1395 void Dispatcher::PopulateSourceMap() {
1396   const std::vector<std::pair<std::string, int> > resources = GetJsResources();
1397   for (std::vector<std::pair<std::string, int> >::const_iterator resource =
1398            resources.begin();
1399        resource != resources.end();
1400        ++resource) {
1401     source_map_.RegisterSource(resource->first, resource->second);
1402   }
1403   delegate_->PopulateSourceMap(&source_map_);
1404 }
1405
1406 bool Dispatcher::IsWithinPlatformApp() {
1407   for (std::set<std::string>::iterator iter = active_extension_ids_.begin();
1408        iter != active_extension_ids_.end();
1409        ++iter) {
1410     const Extension* extension = extensions_.GetByID(*iter);
1411     if (extension && extension->is_platform_app())
1412       return true;
1413   }
1414   return false;
1415 }
1416
1417 // TODO(kalman): This is checking for the wrong thing, it should be checking if
1418 // the frame's security origin is unique. The extension sandbox directive is
1419 // checked for in extensions/common/manifest_handlers/csp_info.cc.
1420 bool Dispatcher::IsSandboxedPage(const GURL& url) const {
1421   if (url.SchemeIs(kExtensionScheme)) {
1422     const Extension* extension = extensions_.GetByID(url.host());
1423     if (extension) {
1424       return SandboxedPageInfo::IsSandboxedPage(extension, url.path());
1425     }
1426   }
1427   return false;
1428 }
1429
1430 Feature::Context Dispatcher::ClassifyJavaScriptContext(
1431     const Extension* extension,
1432     int extension_group,
1433     const GURL& url,
1434     const blink::WebSecurityOrigin& origin) {
1435   // WARNING: This logic must match ProcessMap::GetContextType, as much as
1436   // possible.
1437
1438   DCHECK_GE(extension_group, 0);
1439   if (extension_group == EXTENSION_GROUP_CONTENT_SCRIPTS) {
1440     return extension ?  // TODO(kalman): when does this happen?
1441                Feature::CONTENT_SCRIPT_CONTEXT
1442                      : Feature::UNSPECIFIED_CONTEXT;
1443   }
1444
1445   // We have an explicit check for sandboxed pages before checking whether the
1446   // extension is active in this process because:
1447   // 1. Sandboxed pages run in the same process as regular extension pages, so
1448   //    the extension is considered active.
1449   // 2. ScriptContext creation (which triggers bindings injection) happens
1450   //    before the SecurityContext is updated with the sandbox flags (after
1451   //    reading the CSP header), so the caller can't check if the context's
1452   //    security origin is unique yet.
1453   if (IsSandboxedPage(url))
1454     return Feature::WEB_PAGE_CONTEXT;
1455
1456   if (extension && IsExtensionActive(extension->id())) {
1457     // |extension| is active in this process, but it could be either a true
1458     // extension process or within the extent of a hosted app. In the latter
1459     // case this would usually be considered a (blessed) web page context,
1460     // unless the extension in question is a component extension, in which case
1461     // we cheat and call it blessed.
1462     return (extension->is_hosted_app() &&
1463             extension->location() != Manifest::COMPONENT)
1464                ? Feature::BLESSED_WEB_PAGE_CONTEXT
1465                : Feature::BLESSED_EXTENSION_CONTEXT;
1466   }
1467
1468   // TODO(kalman): This isUnique() check is wrong, it should be performed as
1469   // part of IsSandboxedPage().
1470   if (!origin.isUnique() && extensions_.ExtensionBindingsAllowed(url)) {
1471     if (!extension)  // TODO(kalman): when does this happen?
1472       return Feature::UNSPECIFIED_CONTEXT;
1473     return extension->is_hosted_app() ? Feature::BLESSED_WEB_PAGE_CONTEXT
1474                                       : Feature::UNBLESSED_EXTENSION_CONTEXT;
1475   }
1476
1477   if (!url.is_valid())
1478     return Feature::UNSPECIFIED_CONTEXT;
1479
1480   if (url.SchemeIs(content::kChromeUIScheme))
1481     return Feature::WEBUI_CONTEXT;
1482
1483   return Feature::WEB_PAGE_CONTEXT;
1484 }
1485
1486 v8::Handle<v8::Object> Dispatcher::GetOrCreateObject(
1487     const v8::Handle<v8::Object>& object,
1488     const std::string& field,
1489     v8::Isolate* isolate) {
1490   v8::Handle<v8::String> key = v8::String::NewFromUtf8(isolate, field.c_str());
1491   // If the object has a callback property, it is assumed it is an unavailable
1492   // API, so it is safe to delete. This is checked before GetOrCreateObject is
1493   // called.
1494   if (object->HasRealNamedCallbackProperty(key)) {
1495     object->Delete(key);
1496   } else if (object->HasRealNamedProperty(key)) {
1497     v8::Handle<v8::Value> value = object->Get(key);
1498     CHECK(value->IsObject());
1499     return v8::Handle<v8::Object>::Cast(value);
1500   }
1501
1502   v8::Handle<v8::Object> new_object = v8::Object::New(isolate);
1503   object->Set(key, new_object);
1504   return new_object;
1505 }
1506
1507 v8::Handle<v8::Object> Dispatcher::GetOrCreateBindObjectIfAvailable(
1508     const std::string& api_name,
1509     std::string* bind_name,
1510     ScriptContext* context) {
1511   std::vector<std::string> split;
1512   base::SplitString(api_name, '.', &split);
1513
1514   v8::Handle<v8::Object> bind_object;
1515
1516   // Check if this API has an ancestor. If the API's ancestor is available and
1517   // the API is not available, don't install the bindings for this API. If
1518   // the API is available and its ancestor is not, delete the ancestor and
1519   // install the bindings for the API. This is to prevent loading the ancestor
1520   // API schema if it will not be needed.
1521   //
1522   // For example:
1523   //  If app is available and app.window is not, just install app.
1524   //  If app.window is available and app is not, delete app and install
1525   //  app.window on a new object so app does not have to be loaded.
1526   const FeatureProvider* api_feature_provider =
1527       FeatureProvider::GetAPIFeatures();
1528   std::string ancestor_name;
1529   bool only_ancestor_available = false;
1530
1531   for (size_t i = 0; i < split.size() - 1; ++i) {
1532     ancestor_name += (i ? "." : "") + split[i];
1533     if (api_feature_provider->GetFeature(ancestor_name) &&
1534         context->GetAvailability(ancestor_name).is_available() &&
1535         !context->GetAvailability(api_name).is_available()) {
1536       only_ancestor_available = true;
1537       break;
1538     }
1539
1540     if (bind_object.IsEmpty()) {
1541       bind_object = AsObjectOrEmpty(GetOrCreateChrome(context));
1542       if (bind_object.IsEmpty())
1543         return v8::Handle<v8::Object>();
1544     }
1545     bind_object = GetOrCreateObject(bind_object, split[i], context->isolate());
1546   }
1547
1548   if (only_ancestor_available)
1549     return v8::Handle<v8::Object>();
1550
1551   if (bind_name)
1552     *bind_name = split.back();
1553
1554   return bind_object.IsEmpty() ? AsObjectOrEmpty(GetOrCreateChrome(context))
1555                                : bind_object;
1556 }
1557
1558 }  // namespace extensions