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