content/child/blink_platform_impl.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 "content/child/blink_platform_impl.h"
   6
   7 #include <math.h>
   8
   9 #include <vector>
  10
  11 #include "base/allocator/allocator_extension.h"
  12 #include "base/bind.h"
  13 #include "base/files/file_path.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/memory/singleton.h"
  16 #include "base/message_loop/message_loop.h"
  17 #include "base/metrics/histogram.h"
  18 #include "base/metrics/sparse_histogram.h"
  19 #include "base/metrics/stats_counters.h"
  20 #include "base/platform_file.h"
  21 #include "base/process/process_metrics.h"
  22 #include "base/rand_util.h"
  23 #include "base/strings/string_number_conversions.h"
  24 #include "base/strings/string_util.h"
  25 #include "base/strings/utf_string_conversions.h"
  26 #include "base/synchronization/lock.h"
  27 #include "base/synchronization/waitable_event.h"
  28 #include "base/sys_info.h"
  29 #include "base/time/time.h"
  30 #include "content/child/content_child_helpers.h"
  31 #include "content/child/fling_curve_configuration.h"
  32 #include "content/child/web_discardable_memory_impl.h"
  33 #include "content/child/web_socket_stream_handle_impl.h"
  34 #include "content/child/web_url_loader_impl.h"
  35 #include "content/child/websocket_bridge.h"
  36 #include "content/child/webthread_impl.h"
  37 #include "content/child/worker_task_runner.h"
  38 #include "content/public/common/content_client.h"
  39 #include "grit/blink_resources.h"
  40 #include "grit/webkit_resources.h"
  41 #include "grit/webkit_strings.h"
  42 #include "net/base/data_url.h"
  43 #include "net/base/mime_util.h"
  44 #include "net/base/net_errors.h"
  45 #include "third_party/WebKit/public/platform/WebConvertableToTraceFormat.h"
  46 #include "third_party/WebKit/public/platform/WebData.h"
  47 #include "third_party/WebKit/public/platform/WebString.h"
  48 #include "third_party/WebKit/public/platform/WebWaitableEvent.h"
  49 #include "third_party/WebKit/public/web/WebInputEvent.h"
  50 #include "ui/base/layout.h"
  51
  52 #if defined(OS_ANDROID)
  53 #include "base/android/sys_utils.h"
  54 #include "content/child/fling_animator_impl_android.h"
  55 #endif
  56
  57 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
  58 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
  59 #endif
  60
  61 using blink::WebData;
  62 using blink::WebFallbackThemeEngine;
  63 using blink::WebLocalizedString;
  64 using blink::WebString;
  65 using blink::WebSocketStreamHandle;
  66 using blink::WebThemeEngine;
  67 using blink::WebURL;
  68 using blink::WebURLError;
  69 using blink::WebURLLoader;
  70
  71 namespace content {
  72
  73 namespace {
  74
  75 class WebWaitableEventImpl : public blink::WebWaitableEvent {
  76  public:
  77   WebWaitableEventImpl() : impl_(new base::WaitableEvent(false, false)) {}
  78   virtual ~WebWaitableEventImpl() {}
  79
  80   virtual void wait() { impl_->Wait(); }
  81   virtual void signal() { impl_->Signal(); }
  82
  83   base::WaitableEvent* impl() {
  84     return impl_.get();
  85   }
  86
  87  private:
  88   scoped_ptr<base::WaitableEvent> impl_;
  89   DISALLOW_COPY_AND_ASSIGN(WebWaitableEventImpl);
  90 };
  91
  92 // A simple class to cache the memory usage for a given amount of time.
  93 class MemoryUsageCache {
  94  public:
  95   // Retrieves the Singleton.
  96   static MemoryUsageCache* GetInstance() {
  97     return Singleton<MemoryUsageCache>::get();
  98   }
  99
 100   MemoryUsageCache() : memory_value_(0) { Init(); }
 101   ~MemoryUsageCache() {}
 102
 103   void Init() {
 104     const unsigned int kCacheSeconds = 1;
 105     cache_valid_time_ = base::TimeDelta::FromSeconds(kCacheSeconds);
 106   }
 107
 108   // Returns true if the cached value is fresh.
 109   // Returns false if the cached value is stale, or if |cached_value| is NULL.
 110   bool IsCachedValueValid(size_t* cached_value) {
 111     base::AutoLock scoped_lock(lock_);
 112     if (!cached_value)
 113       return false;
 114     if (base::Time::Now() - last_updated_time_ > cache_valid_time_)
 115       return false;
 116     *cached_value = memory_value_;
 117     return true;
 118   };
 119
 120   // Setter for |memory_value_|, refreshes |last_updated_time_|.
 121   void SetMemoryValue(const size_t value) {
 122     base::AutoLock scoped_lock(lock_);
 123     memory_value_ = value;
 124     last_updated_time_ = base::Time::Now();
 125   }
 126
 127  private:
 128   // The cached memory value.
 129   size_t memory_value_;
 130
 131   // How long the cached value should remain valid.
 132   base::TimeDelta cache_valid_time_;
 133
 134   // The last time the cached value was updated.
 135   base::Time last_updated_time_;
 136
 137   base::Lock lock_;
 138 };
 139
 140 class ConvertableToTraceFormatWrapper
 141     : public base::debug::ConvertableToTraceFormat {
 142  public:
 143   explicit ConvertableToTraceFormatWrapper(
 144       const blink::WebConvertableToTraceFormat& convertable)
 145       : convertable_(convertable) {}
 146   virtual void AppendAsTraceFormat(std::string* out) const OVERRIDE {
 147     *out += convertable_.asTraceFormat().utf8();
 148   }
 149
 150  private:
 151   virtual ~ConvertableToTraceFormatWrapper() {}
 152
 153   blink::WebConvertableToTraceFormat convertable_;
 154 };
 155
 156 }  // namespace
 157
 158 static int ToMessageID(WebLocalizedString::Name name) {
 159   switch (name) {
 160     case WebLocalizedString::AXAMPMFieldText:
 161       return IDS_AX_AM_PM_FIELD_TEXT;
 162     case WebLocalizedString::AXButtonActionVerb:
 163       return IDS_AX_BUTTON_ACTION_VERB;
 164     case WebLocalizedString::AXCheckedCheckBoxActionVerb:
 165       return IDS_AX_CHECKED_CHECK_BOX_ACTION_VERB;
 166     case WebLocalizedString::AXDateTimeFieldEmptyValueText:
 167       return IDS_AX_DATE_TIME_FIELD_EMPTY_VALUE_TEXT;
 168     case WebLocalizedString::AXDayOfMonthFieldText:
 169       return IDS_AX_DAY_OF_MONTH_FIELD_TEXT;
 170     case WebLocalizedString::AXHeadingText:
 171       return IDS_AX_ROLE_HEADING;
 172     case WebLocalizedString::AXHourFieldText:
 173       return IDS_AX_HOUR_FIELD_TEXT;
 174     case WebLocalizedString::AXImageMapText:
 175       return IDS_AX_ROLE_IMAGE_MAP;
 176     case WebLocalizedString::AXLinkActionVerb:
 177       return IDS_AX_LINK_ACTION_VERB;
 178     case WebLocalizedString::AXLinkText:
 179       return IDS_AX_ROLE_LINK;
 180     case WebLocalizedString::AXListMarkerText:
 181       return IDS_AX_ROLE_LIST_MARKER;
 182     case WebLocalizedString::AXMediaDefault:
 183       return IDS_AX_MEDIA_DEFAULT;
 184     case WebLocalizedString::AXMediaAudioElement:
 185       return IDS_AX_MEDIA_AUDIO_ELEMENT;
 186     case WebLocalizedString::AXMediaVideoElement:
 187       return IDS_AX_MEDIA_VIDEO_ELEMENT;
 188     case WebLocalizedString::AXMediaMuteButton:
 189       return IDS_AX_MEDIA_MUTE_BUTTON;
 190     case WebLocalizedString::AXMediaUnMuteButton:
 191       return IDS_AX_MEDIA_UNMUTE_BUTTON;
 192     case WebLocalizedString::AXMediaPlayButton:
 193       return IDS_AX_MEDIA_PLAY_BUTTON;
 194     case WebLocalizedString::AXMediaPauseButton:
 195       return IDS_AX_MEDIA_PAUSE_BUTTON;
 196     case WebLocalizedString::AXMediaSlider:
 197       return IDS_AX_MEDIA_SLIDER;
 198     case WebLocalizedString::AXMediaSliderThumb:
 199       return IDS_AX_MEDIA_SLIDER_THUMB;
 200     case WebLocalizedString::AXMediaCurrentTimeDisplay:
 201       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY;
 202     case WebLocalizedString::AXMediaTimeRemainingDisplay:
 203       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY;
 204     case WebLocalizedString::AXMediaStatusDisplay:
 205       return IDS_AX_MEDIA_STATUS_DISPLAY;
 206     case WebLocalizedString::AXMediaEnterFullscreenButton:
 207       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON;
 208     case WebLocalizedString::AXMediaExitFullscreenButton:
 209       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON;
 210     case WebLocalizedString::AXMediaShowClosedCaptionsButton:
 211       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON;
 212     case WebLocalizedString::AXMediaHideClosedCaptionsButton:
 213       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON;
 214     case WebLocalizedString::AXMediaAudioElementHelp:
 215       return IDS_AX_MEDIA_AUDIO_ELEMENT_HELP;
 216     case WebLocalizedString::AXMediaVideoElementHelp:
 217       return IDS_AX_MEDIA_VIDEO_ELEMENT_HELP;
 218     case WebLocalizedString::AXMediaMuteButtonHelp:
 219       return IDS_AX_MEDIA_MUTE_BUTTON_HELP;
 220     case WebLocalizedString::AXMediaUnMuteButtonHelp:
 221       return IDS_AX_MEDIA_UNMUTE_BUTTON_HELP;
 222     case WebLocalizedString::AXMediaPlayButtonHelp:
 223       return IDS_AX_MEDIA_PLAY_BUTTON_HELP;
 224     case WebLocalizedString::AXMediaPauseButtonHelp:
 225       return IDS_AX_MEDIA_PAUSE_BUTTON_HELP;
 226     case WebLocalizedString::AXMediaSliderHelp:
 227       return IDS_AX_MEDIA_SLIDER_HELP;
 228     case WebLocalizedString::AXMediaSliderThumbHelp:
 229       return IDS_AX_MEDIA_SLIDER_THUMB_HELP;
 230     case WebLocalizedString::AXMediaCurrentTimeDisplayHelp:
 231       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY_HELP;
 232     case WebLocalizedString::AXMediaTimeRemainingDisplayHelp:
 233       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY_HELP;
 234     case WebLocalizedString::AXMediaStatusDisplayHelp:
 235       return IDS_AX_MEDIA_STATUS_DISPLAY_HELP;
 236     case WebLocalizedString::AXMediaEnterFullscreenButtonHelp:
 237       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON_HELP;
 238     case WebLocalizedString::AXMediaExitFullscreenButtonHelp:
 239       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON_HELP;
 240     case WebLocalizedString::AXMediaShowClosedCaptionsButtonHelp:
 241       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON_HELP;
 242     case WebLocalizedString::AXMediaHideClosedCaptionsButtonHelp:
 243       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON_HELP;
 244     case WebLocalizedString::AXMillisecondFieldText:
 245       return IDS_AX_MILLISECOND_FIELD_TEXT;
 246     case WebLocalizedString::AXMinuteFieldText:
 247       return IDS_AX_MINUTE_FIELD_TEXT;
 248     case WebLocalizedString::AXMonthFieldText:
 249       return IDS_AX_MONTH_FIELD_TEXT;
 250     case WebLocalizedString::AXRadioButtonActionVerb:
 251       return IDS_AX_RADIO_BUTTON_ACTION_VERB;
 252     case WebLocalizedString::AXSecondFieldText:
 253       return IDS_AX_SECOND_FIELD_TEXT;
 254     case WebLocalizedString::AXTextFieldActionVerb:
 255       return IDS_AX_TEXT_FIELD_ACTION_VERB;
 256     case WebLocalizedString::AXUncheckedCheckBoxActionVerb:
 257       return IDS_AX_UNCHECKED_CHECK_BOX_ACTION_VERB;
 258     case WebLocalizedString::AXWebAreaText:
 259       return IDS_AX_ROLE_WEB_AREA;
 260     case WebLocalizedString::AXWeekOfYearFieldText:
 261       return IDS_AX_WEEK_OF_YEAR_FIELD_TEXT;
 262     case WebLocalizedString::AXYearFieldText:
 263       return IDS_AX_YEAR_FIELD_TEXT;
 264     case WebLocalizedString::CalendarClear:
 265       return IDS_FORM_CALENDAR_CLEAR;
 266     case WebLocalizedString::CalendarToday:
 267       return IDS_FORM_CALENDAR_TODAY;
 268     case WebLocalizedString::DateFormatDayInMonthLabel:
 269       return IDS_FORM_DATE_FORMAT_DAY_IN_MONTH;
 270     case WebLocalizedString::DateFormatMonthLabel:
 271       return IDS_FORM_DATE_FORMAT_MONTH;
 272     case WebLocalizedString::DateFormatYearLabel:
 273       return IDS_FORM_DATE_FORMAT_YEAR;
 274     case WebLocalizedString::DetailsLabel:
 275       return IDS_DETAILS_WITHOUT_SUMMARY_LABEL;
 276     case WebLocalizedString::FileButtonChooseFileLabel:
 277       return IDS_FORM_FILE_BUTTON_LABEL;
 278     case WebLocalizedString::FileButtonChooseMultipleFilesLabel:
 279       return IDS_FORM_MULTIPLE_FILES_BUTTON_LABEL;
 280     case WebLocalizedString::FileButtonNoFileSelectedLabel:
 281       return IDS_FORM_FILE_NO_FILE_LABEL;
 282     case WebLocalizedString::InputElementAltText:
 283       return IDS_FORM_INPUT_ALT;
 284     case WebLocalizedString::KeygenMenuHighGradeKeySize:
 285       return IDS_KEYGEN_HIGH_GRADE_KEY;
 286     case WebLocalizedString::KeygenMenuMediumGradeKeySize:
 287       return IDS_KEYGEN_MED_GRADE_KEY;
 288     case WebLocalizedString::MissingPluginText:
 289       return IDS_PLUGIN_INITIALIZATION_ERROR;
 290     case WebLocalizedString::MultipleFileUploadText:
 291       return IDS_FORM_FILE_MULTIPLE_UPLOAD;
 292     case WebLocalizedString::OtherColorLabel:
 293       return IDS_FORM_OTHER_COLOR_LABEL;
 294     case WebLocalizedString::OtherDateLabel:
 295         return IDS_FORM_OTHER_DATE_LABEL;
 296     case WebLocalizedString::OtherMonthLabel:
 297       return IDS_FORM_OTHER_MONTH_LABEL;
 298     case WebLocalizedString::OtherTimeLabel:
 299       return IDS_FORM_OTHER_TIME_LABEL;
 300     case WebLocalizedString::OtherWeekLabel:
 301       return IDS_FORM_OTHER_WEEK_LABEL;
 302     case WebLocalizedString::PlaceholderForDayOfMonthField:
 303       return IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD;
 304     case WebLocalizedString::PlaceholderForMonthField:
 305       return IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD;
 306     case WebLocalizedString::PlaceholderForYearField:
 307       return IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD;
 308     case WebLocalizedString::ResetButtonDefaultLabel:
 309       return IDS_FORM_RESET_LABEL;
 310     case WebLocalizedString::SearchableIndexIntroduction:
 311       return IDS_SEARCHABLE_INDEX_INTRO;
 312     case WebLocalizedString::SearchMenuClearRecentSearchesText:
 313       return IDS_RECENT_SEARCHES_CLEAR;
 314     case WebLocalizedString::SearchMenuNoRecentSearchesText:
 315       return IDS_RECENT_SEARCHES_NONE;
 316     case WebLocalizedString::SearchMenuRecentSearchesText:
 317       return IDS_RECENT_SEARCHES;
 318     case WebLocalizedString::SelectMenuListText:
 319       return IDS_FORM_SELECT_MENU_LIST_TEXT;
 320     case WebLocalizedString::SubmitButtonDefaultLabel:
 321       return IDS_FORM_SUBMIT_LABEL;
 322     case WebLocalizedString::ThisMonthButtonLabel:
 323       return IDS_FORM_THIS_MONTH_LABEL;
 324     case WebLocalizedString::ThisWeekButtonLabel:
 325       return IDS_FORM_THIS_WEEK_LABEL;
 326     case WebLocalizedString::ValidationBadInputForDateTime:
 327       return IDS_FORM_VALIDATION_BAD_INPUT_DATETIME;
 328     case WebLocalizedString::ValidationBadInputForNumber:
 329       return IDS_FORM_VALIDATION_BAD_INPUT_NUMBER;
 330     case WebLocalizedString::ValidationPatternMismatch:
 331       return IDS_FORM_VALIDATION_PATTERN_MISMATCH;
 332     case WebLocalizedString::ValidationRangeOverflow:
 333       return IDS_FORM_VALIDATION_RANGE_OVERFLOW;
 334     case WebLocalizedString::ValidationRangeOverflowDateTime:
 335       return IDS_FORM_VALIDATION_RANGE_OVERFLOW_DATETIME;
 336     case WebLocalizedString::ValidationRangeUnderflow:
 337       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW;
 338     case WebLocalizedString::ValidationRangeUnderflowDateTime:
 339       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW_DATETIME;
 340     case WebLocalizedString::ValidationStepMismatch:
 341       return IDS_FORM_VALIDATION_STEP_MISMATCH;
 342     case WebLocalizedString::ValidationStepMismatchCloseToLimit:
 343       return IDS_FORM_VALIDATION_STEP_MISMATCH_CLOSE_TO_LIMIT;
 344     case WebLocalizedString::ValidationTooLong:
 345       return IDS_FORM_VALIDATION_TOO_LONG;
 346     case WebLocalizedString::ValidationTypeMismatch:
 347       return IDS_FORM_VALIDATION_TYPE_MISMATCH;
 348     case WebLocalizedString::ValidationTypeMismatchForEmail:
 349       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL;
 350     case WebLocalizedString::ValidationTypeMismatchForEmailEmpty:
 351       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY;
 352     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain:
 353       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_DOMAIN;
 354     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal:
 355       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_LOCAL;
 356     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain:
 357       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOMAIN;
 358     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots:
 359       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOTS;
 360     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal:
 361       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_LOCAL;
 362     case WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign:
 363       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_NO_AT_SIGN;
 364     case WebLocalizedString::ValidationTypeMismatchForMultipleEmail:
 365       return IDS_FORM_VALIDATION_TYPE_MISMATCH_MULTIPLE_EMAIL;
 366     case WebLocalizedString::ValidationTypeMismatchForURL:
 367       return IDS_FORM_VALIDATION_TYPE_MISMATCH_URL;
 368     case WebLocalizedString::ValidationValueMissing:
 369       return IDS_FORM_VALIDATION_VALUE_MISSING;
 370     case WebLocalizedString::ValidationValueMissingForCheckbox:
 371       return IDS_FORM_VALIDATION_VALUE_MISSING_CHECKBOX;
 372     case WebLocalizedString::ValidationValueMissingForFile:
 373       return IDS_FORM_VALIDATION_VALUE_MISSING_FILE;
 374     case WebLocalizedString::ValidationValueMissingForMultipleFile:
 375       return IDS_FORM_VALIDATION_VALUE_MISSING_MULTIPLE_FILE;
 376     case WebLocalizedString::ValidationValueMissingForRadio:
 377       return IDS_FORM_VALIDATION_VALUE_MISSING_RADIO;
 378     case WebLocalizedString::ValidationValueMissingForSelect:
 379       return IDS_FORM_VALIDATION_VALUE_MISSING_SELECT;
 380     case WebLocalizedString::WeekFormatTemplate:
 381       return IDS_FORM_INPUT_WEEK_TEMPLATE;
 382     case WebLocalizedString::WeekNumberLabel:
 383       return IDS_FORM_WEEK_NUMBER_LABEL;
 384     // This "default:" line exists to avoid compile warnings about enum
 385     // coverage when we add a new symbol to WebLocalizedString.h in WebKit.
 386     // After a planned WebKit patch is landed, we need to add a case statement
 387     // for the added symbol here.
 388     default:
 389       break;
 390   }
 391   return -1;
 392 }
 393
 394 BlinkPlatformImpl::BlinkPlatformImpl()
 395     : main_loop_(base::MessageLoop::current()),
 396       shared_timer_func_(NULL),
 397       shared_timer_fire_time_(0.0),
 398       shared_timer_fire_time_was_set_while_suspended_(false),
 399       shared_timer_suspended_(0),
 400       fling_curve_configuration_(new FlingCurveConfiguration),
 401       current_thread_slot_(&DestroyCurrentThread) {}
 402
 403 BlinkPlatformImpl::~BlinkPlatformImpl() {
 404 }
 405
 406 WebURLLoader* BlinkPlatformImpl::createURLLoader() {
 407   return new WebURLLoaderImpl;
 408 }
 409
 410 WebSocketStreamHandle* BlinkPlatformImpl::createSocketStreamHandle() {
 411   return new WebSocketStreamHandleImpl;
 412 }
 413
 414 blink::WebSocketHandle* BlinkPlatformImpl::createWebSocketHandle() {
 415   return new WebSocketBridge;
 416 }
 417
 418 WebString BlinkPlatformImpl::userAgent() {
 419   return WebString::fromUTF8(GetContentClient()->GetUserAgent());
 420 }
 421
 422 WebData BlinkPlatformImpl::parseDataURL(const WebURL& url,
 423                                         WebString& mimetype_out,
 424                                         WebString& charset_out) {
 425   std::string mime_type, char_set, data;
 426   if (net::DataURL::Parse(url, &mime_type, &char_set, &data)
 427       && net::IsSupportedMimeType(mime_type)) {
 428     mimetype_out = WebString::fromUTF8(mime_type);
 429     charset_out = WebString::fromUTF8(char_set);
 430     return data;
 431   }
 432   return WebData();
 433 }
 434
 435 WebURLError BlinkPlatformImpl::cancelledError(
 436     const WebURL& unreachableURL) const {
 437   return WebURLLoaderImpl::CreateError(unreachableURL, false, net::ERR_ABORTED);
 438 }
 439
 440 blink::WebThread* BlinkPlatformImpl::createThread(const char* name) {
 441   return new WebThreadImpl(name);
 442 }
 443
 444 blink::WebThread* BlinkPlatformImpl::currentThread() {
 445   WebThreadImplForMessageLoop* thread =
 446       static_cast<WebThreadImplForMessageLoop*>(current_thread_slot_.Get());
 447   if (thread)
 448     return (thread);
 449
 450   scoped_refptr<base::MessageLoopProxy> message_loop =
 451       base::MessageLoopProxy::current();
 452   if (!message_loop.get())
 453     return NULL;
 454
 455   thread = new WebThreadImplForMessageLoop(message_loop.get());
 456   current_thread_slot_.Set(thread);
 457   return thread;
 458 }
 459
 460 blink::WebWaitableEvent* BlinkPlatformImpl::createWaitableEvent() {
 461   return new WebWaitableEventImpl();
 462 }
 463
 464 blink::WebWaitableEvent* BlinkPlatformImpl::waitMultipleEvents(
 465     const blink::WebVector<blink::WebWaitableEvent*>& web_events) {
 466   std::vector<base::WaitableEvent*> events;
 467   for (size_t i = 0; i < web_events.size(); ++i)
 468     events.push_back(static_cast<WebWaitableEventImpl*>(web_events[i])->impl());
 469   size_t idx = base::WaitableEvent::WaitMany(
 470       vector_as_array(&events), events.size());
 471   DCHECK_LT(idx, web_events.size());
 472   return web_events[idx];
 473 }
 474
 475 void BlinkPlatformImpl::decrementStatsCounter(const char* name) {
 476   base::StatsCounter(name).Decrement();
 477 }
 478
 479 void BlinkPlatformImpl::incrementStatsCounter(const char* name) {
 480   base::StatsCounter(name).Increment();
 481 }
 482
 483 void BlinkPlatformImpl::histogramCustomCounts(
 484     const char* name, int sample, int min, int max, int bucket_count) {
 485   // Copied from histogram macro, but without the static variable caching
 486   // the histogram because name is dynamic.
 487   base::HistogramBase* counter =
 488       base::Histogram::FactoryGet(name, min, max, bucket_count,
 489           base::HistogramBase::kUmaTargetedHistogramFlag);
 490   DCHECK_EQ(name, counter->histogram_name());
 491   counter->Add(sample);
 492 }
 493
 494 void BlinkPlatformImpl::histogramEnumeration(
 495     const char* name, int sample, int boundary_value) {
 496   // Copied from histogram macro, but without the static variable caching
 497   // the histogram because name is dynamic.
 498   base::HistogramBase* counter =
 499       base::LinearHistogram::FactoryGet(name, 1, boundary_value,
 500           boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag);
 501   DCHECK_EQ(name, counter->histogram_name());
 502   counter->Add(sample);
 503 }
 504
 505 void BlinkPlatformImpl::histogramSparse(const char* name, int sample) {
 506   // For sparse histograms, we can use the macro, as it does not incorporate a
 507   // static.
 508   UMA_HISTOGRAM_SPARSE_SLOWLY(name, sample);
 509 }
 510
 511 const unsigned char* BlinkPlatformImpl::getTraceCategoryEnabledFlag(
 512     const char* category_group) {
 513   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 514 }
 515
 516 long* BlinkPlatformImpl::getTraceSamplingState(
 517     const unsigned thread_bucket) {
 518   switch (thread_bucket) {
 519     case 0:
 520       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(0));
 521     case 1:
 522       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(1));
 523     case 2:
 524       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(2));
 525     default:
 526       NOTREACHED() << "Unknown thread bucket type.";
 527   }
 528   return NULL;
 529 }
 530
 531 COMPILE_ASSERT(
 532     sizeof(blink::Platform::TraceEventHandle) ==
 533         sizeof(base::debug::TraceEventHandle),
 534     TraceEventHandle_types_must_be_same_size);
 535
 536 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 537     char phase,
 538     const unsigned char* category_group_enabled,
 539     const char* name,
 540     unsigned long long id,
 541     int num_args,
 542     const char** arg_names,
 543     const unsigned char* arg_types,
 544     const unsigned long long* arg_values,
 545     unsigned char flags) {
 546   base::debug::TraceEventHandle handle = TRACE_EVENT_API_ADD_TRACE_EVENT(
 547       phase, category_group_enabled, name, id,
 548       num_args, arg_names, arg_types, arg_values, NULL, flags);
 549   blink::Platform::TraceEventHandle result;
 550   memcpy(&result, &handle, sizeof(result));
 551   return result;
 552 }
 553
 554 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 555     char phase,
 556     const unsigned char* category_group_enabled,
 557     const char* name,
 558     unsigned long long id,
 559     int num_args,
 560     const char** arg_names,
 561     const unsigned char* arg_types,
 562     const unsigned long long* arg_values,
 563     const blink::WebConvertableToTraceFormat* convertable_values,
 564     unsigned char flags) {
 565   scoped_refptr<base::debug::ConvertableToTraceFormat> convertable_wrappers[2];
 566   if (convertable_values) {
 567     size_t size = std::min(static_cast<size_t>(num_args),
 568                            arraysize(convertable_wrappers));
 569     for (size_t i = 0; i < size; ++i) {
 570       if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) {
 571         convertable_wrappers[i] =
 572             new ConvertableToTraceFormatWrapper(convertable_values[i]);
 573       }
 574     }
 575   }
 576   base::debug::TraceEventHandle handle =
 577       TRACE_EVENT_API_ADD_TRACE_EVENT(phase,
 578                                       category_group_enabled,
 579                                       name,
 580                                       id,
 581                                       num_args,
 582                                       arg_names,
 583                                       arg_types,
 584                                       arg_values,
 585                                       convertable_wrappers,
 586                                       flags);
 587   blink::Platform::TraceEventHandle result;
 588   memcpy(&result, &handle, sizeof(result));
 589   return result;
 590 }
 591
 592 void BlinkPlatformImpl::updateTraceEventDuration(
 593     const unsigned char* category_group_enabled,
 594     const char* name,
 595     TraceEventHandle handle) {
 596   base::debug::TraceEventHandle traceEventHandle;
 597   memcpy(&traceEventHandle, &handle, sizeof(handle));
 598   TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
 599       category_group_enabled, name, traceEventHandle);
 600 }
 601
 602 namespace {
 603
 604 WebData loadAudioSpatializationResource(const char* name) {
 605 #ifdef IDR_AUDIO_SPATIALIZATION_COMPOSITE
 606   if (!strcmp(name, "Composite")) {
 607     base::StringPiece resource = GetContentClient()->GetDataResource(
 608         IDR_AUDIO_SPATIALIZATION_COMPOSITE, ui::SCALE_FACTOR_NONE);
 609     return WebData(resource.data(), resource.size());
 610   }
 611 #endif
 612
 613 #ifdef IDR_AUDIO_SPATIALIZATION_T000_P000
 614   const size_t kExpectedSpatializationNameLength = 31;
 615   if (strlen(name) != kExpectedSpatializationNameLength) {
 616     return WebData();
 617   }
 618
 619   // Extract the azimuth and elevation from the resource name.
 620   int azimuth = 0;
 621   int elevation = 0;
 622   int values_parsed =
 623       sscanf(name, "IRC_Composite_C_R0195_T%3d_P%3d", &azimuth, &elevation);
 624   if (values_parsed != 2) {
 625     return WebData();
 626   }
 627
 628   // The resource index values go through the elevations first, then azimuths.
 629   const int kAngleSpacing = 15;
 630
 631   // 0 <= elevation <= 90 (or 315 <= elevation <= 345)
 632   // in increments of 15 degrees.
 633   int elevation_index =
 634       elevation <= 90 ? elevation / kAngleSpacing :
 635       7 + (elevation - 315) / kAngleSpacing;
 636   bool is_elevation_index_good = 0 <= elevation_index && elevation_index < 10;
 637
 638   // 0 <= azimuth < 360 in increments of 15 degrees.
 639   int azimuth_index = azimuth / kAngleSpacing;
 640   bool is_azimuth_index_good = 0 <= azimuth_index && azimuth_index < 24;
 641
 642   const int kNumberOfElevations = 10;
 643   const int kNumberOfAudioResources = 240;
 644   int resource_index = kNumberOfElevations * azimuth_index + elevation_index;
 645   bool is_resource_index_good = 0 <= resource_index &&
 646       resource_index < kNumberOfAudioResources;
 647
 648   if (is_azimuth_index_good && is_elevation_index_good &&
 649       is_resource_index_good) {
 650     const int kFirstAudioResourceIndex = IDR_AUDIO_SPATIALIZATION_T000_P000;
 651     base::StringPiece resource = GetContentClient()->GetDataResource(
 652         kFirstAudioResourceIndex + resource_index, ui::SCALE_FACTOR_NONE);
 653     return WebData(resource.data(), resource.size());
 654   }
 655 #endif  // IDR_AUDIO_SPATIALIZATION_T000_P000
 656
 657   NOTREACHED();
 658   return WebData();
 659 }
 660
 661 struct DataResource {
 662   const char* name;
 663   int id;
 664   ui::ScaleFactor scale_factor;
 665 };
 666
 667 const DataResource kDataResources[] = {
 668   { "missingImage", IDR_BROKENIMAGE, ui::SCALE_FACTOR_100P },
 669   { "missingImage@2x", IDR_BROKENIMAGE, ui::SCALE_FACTOR_200P },
 670   { "mediaplayerPause", IDR_MEDIAPLAYER_PAUSE_BUTTON, ui::SCALE_FACTOR_100P },
 671   { "mediaplayerPauseHover",
 672     IDR_MEDIAPLAYER_PAUSE_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 673   { "mediaplayerPauseDown",
 674     IDR_MEDIAPLAYER_PAUSE_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 675   { "mediaplayerPlay", IDR_MEDIAPLAYER_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 676   { "mediaplayerPlayHover",
 677     IDR_MEDIAPLAYER_PLAY_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 678   { "mediaplayerPlayDown",
 679     IDR_MEDIAPLAYER_PLAY_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 680   { "mediaplayerPlayDisabled",
 681     IDR_MEDIAPLAYER_PLAY_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 682   { "mediaplayerSoundLevel3",
 683     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON, ui::SCALE_FACTOR_100P },
 684   { "mediaplayerSoundLevel3Hover",
 685     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 686   { "mediaplayerSoundLevel3Down",
 687     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 688   { "mediaplayerSoundLevel2",
 689     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON, ui::SCALE_FACTOR_100P },
 690   { "mediaplayerSoundLevel2Hover",
 691     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 692   { "mediaplayerSoundLevel2Down",
 693     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 694   { "mediaplayerSoundLevel1",
 695     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON, ui::SCALE_FACTOR_100P },
 696   { "mediaplayerSoundLevel1Hover",
 697     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 698   { "mediaplayerSoundLevel1Down",
 699     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 700   { "mediaplayerSoundLevel0",
 701     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON, ui::SCALE_FACTOR_100P },
 702   { "mediaplayerSoundLevel0Hover",
 703     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 704   { "mediaplayerSoundLevel0Down",
 705     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 706   { "mediaplayerSoundDisabled",
 707     IDR_MEDIAPLAYER_SOUND_DISABLED, ui::SCALE_FACTOR_100P },
 708   { "mediaplayerSliderThumb",
 709     IDR_MEDIAPLAYER_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 710   { "mediaplayerSliderThumbHover",
 711     IDR_MEDIAPLAYER_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 712   { "mediaplayerSliderThumbDown",
 713     IDR_MEDIAPLAYER_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 714   { "mediaplayerVolumeSliderThumb",
 715     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 716   { "mediaplayerVolumeSliderThumbHover",
 717     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 718   { "mediaplayerVolumeSliderThumbDown",
 719     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 720   { "mediaplayerVolumeSliderThumbDisabled",
 721     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DISABLED, ui::SCALE_FACTOR_100P },
 722   { "mediaplayerClosedCaption",
 723     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON, ui::SCALE_FACTOR_100P },
 724   { "mediaplayerClosedCaptionHover",
 725     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 726   { "mediaplayerClosedCaptionDown",
 727     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 728   { "mediaplayerClosedCaptionDisabled",
 729     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 730   { "mediaplayerFullscreen",
 731     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON, ui::SCALE_FACTOR_100P },
 732   { "mediaplayerFullscreenHover",
 733     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 734   { "mediaplayerFullscreenDown",
 735     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 736   { "mediaplayerFullscreenDisabled",
 737     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 738   { "mediaplayerOverlayPlay",
 739     IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 740 #if defined(OS_MACOSX)
 741   { "overhangPattern", IDR_OVERHANG_PATTERN, ui::SCALE_FACTOR_100P },
 742   { "overhangShadow", IDR_OVERHANG_SHADOW, ui::SCALE_FACTOR_100P },
 743 #endif
 744   { "panIcon", IDR_PAN_SCROLL_ICON, ui::SCALE_FACTOR_100P },
 745   { "searchCancel", IDR_SEARCH_CANCEL, ui::SCALE_FACTOR_100P },
 746   { "searchCancelPressed", IDR_SEARCH_CANCEL_PRESSED, ui::SCALE_FACTOR_100P },
 747   { "searchMagnifier", IDR_SEARCH_MAGNIFIER, ui::SCALE_FACTOR_100P },
 748   { "searchMagnifierResults",
 749     IDR_SEARCH_MAGNIFIER_RESULTS, ui::SCALE_FACTOR_100P },
 750   { "textAreaResizeCorner", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_100P },
 751   { "textAreaResizeCorner@2x", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_200P },
 752   { "generatePassword", IDR_PASSWORD_GENERATION_ICON, ui::SCALE_FACTOR_100P },
 753   { "generatePasswordHover",
 754     IDR_PASSWORD_GENERATION_ICON_HOVER, ui::SCALE_FACTOR_100P },
 755 };
 756
 757 }  // namespace
 758
 759 WebData BlinkPlatformImpl::loadResource(const char* name) {
 760   // Some clients will call into this method with an empty |name| when they have
 761   // optional resources.  For example, the PopupMenuChromium code can have icons
 762   // for some Autofill items but not for others.
 763   if (!strlen(name))
 764     return WebData();
 765
 766   // Check the name prefix to see if it's an audio resource.
 767   if (StartsWithASCII(name, "IRC_Composite", true) ||
 768       StartsWithASCII(name, "Composite", true))
 769     return loadAudioSpatializationResource(name);
 770
 771   // TODO(flackr): We should use a better than linear search here, a trie would
 772   // be ideal.
 773   for (size_t i = 0; i < arraysize(kDataResources); ++i) {
 774     if (!strcmp(name, kDataResources[i].name)) {
 775       base::StringPiece resource = GetContentClient()->GetDataResource(
 776           kDataResources[i].id, kDataResources[i].scale_factor);
 777       return WebData(resource.data(), resource.size());
 778     }
 779   }
 780
 781   NOTREACHED() << "Unknown image resource " << name;
 782   return WebData();
 783 }
 784
 785 WebString BlinkPlatformImpl::queryLocalizedString(
 786     WebLocalizedString::Name name) {
 787   int message_id = ToMessageID(name);
 788   if (message_id < 0)
 789     return WebString();
 790   return GetContentClient()->GetLocalizedString(message_id);
 791 }
 792
 793 WebString BlinkPlatformImpl::queryLocalizedString(
 794     WebLocalizedString::Name name, int numeric_value) {
 795   return queryLocalizedString(name, base::IntToString16(numeric_value));
 796 }
 797
 798 WebString BlinkPlatformImpl::queryLocalizedString(
 799     WebLocalizedString::Name name, const WebString& value) {
 800   int message_id = ToMessageID(name);
 801   if (message_id < 0)
 802     return WebString();
 803   return ReplaceStringPlaceholders(GetContentClient()->GetLocalizedString(
 804       message_id), value, NULL);
 805 }
 806
 807 WebString BlinkPlatformImpl::queryLocalizedString(
 808     WebLocalizedString::Name name,
 809     const WebString& value1,
 810     const WebString& value2) {
 811   int message_id = ToMessageID(name);
 812   if (message_id < 0)
 813     return WebString();
 814   std::vector<base::string16> values;
 815   values.reserve(2);
 816   values.push_back(value1);
 817   values.push_back(value2);
 818   return ReplaceStringPlaceholders(
 819       GetContentClient()->GetLocalizedString(message_id), values, NULL);
 820 }
 821
 822 double BlinkPlatformImpl::currentTime() {
 823   return base::Time::Now().ToDoubleT();
 824 }
 825
 826 double BlinkPlatformImpl::monotonicallyIncreasingTime() {
 827   return base::TimeTicks::Now().ToInternalValue() /
 828       static_cast<double>(base::Time::kMicrosecondsPerSecond);
 829 }
 830
 831 void BlinkPlatformImpl::cryptographicallyRandomValues(
 832     unsigned char* buffer, size_t length) {
 833   base::RandBytes(buffer, length);
 834 }
 835
 836 void BlinkPlatformImpl::setSharedTimerFiredFunction(void (*func)()) {
 837   shared_timer_func_ = func;
 838 }
 839
 840 void BlinkPlatformImpl::setSharedTimerFireInterval(
 841     double interval_seconds) {
 842   shared_timer_fire_time_ = interval_seconds + monotonicallyIncreasingTime();
 843   if (shared_timer_suspended_) {
 844     shared_timer_fire_time_was_set_while_suspended_ = true;
 845     return;
 846   }
 847
 848   // By converting between double and int64 representation, we run the risk
 849   // of losing precision due to rounding errors. Performing computations in
 850   // microseconds reduces this risk somewhat. But there still is the potential
 851   // of us computing a fire time for the timer that is shorter than what we
 852   // need.
 853   // As the event loop will check event deadlines prior to actually firing
 854   // them, there is a risk of needlessly rescheduling events and of
 855   // needlessly looping if sleep times are too short even by small amounts.
 856   // This results in measurable performance degradation unless we use ceil() to
 857   // always round up the sleep times.
 858   int64 interval = static_cast<int64>(
 859       ceil(interval_seconds * base::Time::kMillisecondsPerSecond)
 860       * base::Time::kMicrosecondsPerMillisecond);
 861
 862   if (interval < 0)
 863     interval = 0;
 864
 865   shared_timer_.Stop();
 866   shared_timer_.Start(FROM_HERE, base::TimeDelta::FromMicroseconds(interval),
 867                       this, &BlinkPlatformImpl::DoTimeout);
 868   OnStartSharedTimer(base::TimeDelta::FromMicroseconds(interval));
 869 }
 870
 871 void BlinkPlatformImpl::stopSharedTimer() {
 872   shared_timer_.Stop();
 873 }
 874
 875 void BlinkPlatformImpl::callOnMainThread(
 876     void (*func)(void*), void* context) {
 877   main_loop_->PostTask(FROM_HERE, base::Bind(func, context));
 878 }
 879
 880 blink::WebGestureCurve* BlinkPlatformImpl::createFlingAnimationCurve(
 881     int device_source,
 882     const blink::WebFloatPoint& velocity,
 883     const blink::WebSize& cumulative_scroll) {
 884 #if defined(OS_ANDROID)
 885   return FlingAnimatorImpl::CreateAndroidGestureCurve(
 886       velocity,
 887       cumulative_scroll);
 888 #endif
 889
 890   if (device_source == blink::WebGestureEvent::Touchscreen)
 891     return fling_curve_configuration_->CreateForTouchScreen(velocity,
 892                                                             cumulative_scroll);
 893
 894   return fling_curve_configuration_->CreateForTouchPad(velocity,
 895                                                        cumulative_scroll);
 896 }
 897
 898 void BlinkPlatformImpl::didStartWorkerRunLoop(
 899     const blink::WebWorkerRunLoop& runLoop) {
 900   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
 901   worker_task_runner->OnWorkerRunLoopStarted(runLoop);
 902 }
 903
 904 void BlinkPlatformImpl::didStopWorkerRunLoop(
 905     const blink::WebWorkerRunLoop& runLoop) {
 906   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
 907   worker_task_runner->OnWorkerRunLoopStopped(runLoop);
 908 }
 909
 910 blink::WebCrypto* BlinkPlatformImpl::crypto() {
 911   WebCryptoImpl::EnsureInit();
 912   return &web_crypto_;
 913 }
 914
 915
 916 WebThemeEngine* BlinkPlatformImpl::themeEngine() {
 917   return &native_theme_engine_;
 918 }
 919
 920 WebFallbackThemeEngine* BlinkPlatformImpl::fallbackThemeEngine() {
 921   return &fallback_theme_engine_;
 922 }
 923
 924 base::PlatformFile BlinkPlatformImpl::databaseOpenFile(
 925     const blink::WebString& vfs_file_name, int desired_flags) {
 926   return base::kInvalidPlatformFileValue;
 927 }
 928
 929 int BlinkPlatformImpl::databaseDeleteFile(
 930     const blink::WebString& vfs_file_name, bool sync_dir) {
 931   return -1;
 932 }
 933
 934 long BlinkPlatformImpl::databaseGetFileAttributes(
 935     const blink::WebString& vfs_file_name) {
 936   return 0;
 937 }
 938
 939 long long BlinkPlatformImpl::databaseGetFileSize(
 940     const blink::WebString& vfs_file_name) {
 941   return 0;
 942 }
 943
 944 long long BlinkPlatformImpl::databaseGetSpaceAvailableForOrigin(
 945     const blink::WebString& origin_identifier) {
 946   return 0;
 947 }
 948
 949 blink::WebString BlinkPlatformImpl::signedPublicKeyAndChallengeString(
 950     unsigned key_size_index,
 951     const blink::WebString& challenge,
 952     const blink::WebURL& url) {
 953   return blink::WebString("");
 954 }
 955
 956 static scoped_ptr<base::ProcessMetrics> CurrentProcessMetrics() {
 957   using base::ProcessMetrics;
 958 #if defined(OS_MACOSX)
 959   return scoped_ptr<ProcessMetrics>(
 960       // The default port provider is sufficient to get data for the current
 961       // process.
 962       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
 963                                            NULL));
 964 #else
 965   return scoped_ptr<ProcessMetrics>(
 966       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle()));
 967 #endif
 968 }
 969
 970 static size_t getMemoryUsageMB(bool bypass_cache) {
 971   size_t current_mem_usage = 0;
 972   MemoryUsageCache* mem_usage_cache_singleton = MemoryUsageCache::GetInstance();
 973   if (!bypass_cache &&
 974       mem_usage_cache_singleton->IsCachedValueValid(&current_mem_usage))
 975     return current_mem_usage;
 976
 977   current_mem_usage = GetMemoryUsageKB() >> 10;
 978   mem_usage_cache_singleton->SetMemoryValue(current_mem_usage);
 979   return current_mem_usage;
 980 }
 981
 982 size_t BlinkPlatformImpl::memoryUsageMB() {
 983   return getMemoryUsageMB(false);
 984 }
 985
 986 size_t BlinkPlatformImpl::actualMemoryUsageMB() {
 987   return getMemoryUsageMB(true);
 988 }
 989
 990 size_t BlinkPlatformImpl::physicalMemoryMB() {
 991   return static_cast<size_t>(base::SysInfo::AmountOfPhysicalMemoryMB());
 992 }
 993
 994 size_t BlinkPlatformImpl::virtualMemoryLimitMB() {
 995   return static_cast<size_t>(base::SysInfo::AmountOfVirtualMemoryMB());
 996 }
 997
 998 size_t BlinkPlatformImpl::numberOfProcessors() {
 999   return static_cast<size_t>(base::SysInfo::NumberOfProcessors());
1000 }
1001
1002 void BlinkPlatformImpl::startHeapProfiling(
1003   const blink::WebString& prefix) {
1004   // FIXME(morrita): Make this built on windows.
1005 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1006   HeapProfilerStart(prefix.utf8().data());
1007 #endif
1008 }
1009
1010 void BlinkPlatformImpl::stopHeapProfiling() {
1011 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1012   HeapProfilerStop();
1013 #endif
1014 }
1015
1016 void BlinkPlatformImpl::dumpHeapProfiling(
1017   const blink::WebString& reason) {
1018 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1019   HeapProfilerDump(reason.utf8().data());
1020 #endif
1021 }
1022
1023 WebString BlinkPlatformImpl::getHeapProfile() {
1024 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1025   char* data = GetHeapProfile();
1026   WebString result = WebString::fromUTF8(std::string(data));
1027   free(data);
1028   return result;
1029 #else
1030   return WebString();
1031 #endif
1032 }
1033
1034 bool BlinkPlatformImpl::processMemorySizesInBytes(
1035     size_t* private_bytes,
1036     size_t* shared_bytes) {
1037   return CurrentProcessMetrics()->GetMemoryBytes(private_bytes, shared_bytes);
1038 }
1039
1040 bool BlinkPlatformImpl::memoryAllocatorWasteInBytes(size_t* size) {
1041   return base::allocator::GetAllocatorWasteSize(size);
1042 }
1043
1044 blink::WebDiscardableMemory*
1045 BlinkPlatformImpl::allocateAndLockDiscardableMemory(size_t bytes) {
1046   base::DiscardableMemoryType type =
1047       base::DiscardableMemory::GetPreferredType();
1048   if (type == base::DISCARDABLE_MEMORY_TYPE_EMULATED)
1049     return NULL;
1050   return content::WebDiscardableMemoryImpl::CreateLockedMemory(bytes).release();
1051 }
1052
1053 size_t BlinkPlatformImpl::maxDecodedImageBytes() {
1054 #if defined(OS_ANDROID)
1055   if (base::android::SysUtils::IsLowEndDevice()) {
1056     // Limit image decoded size to 3M pixels on low end devices.
1057     // 4 is maximum number of bytes per pixel.
1058     return 3 * 1024 * 1024 * 4;
1059   }
1060   // For other devices, limit decoded image size based on the amount of physical
1061   // memory.
1062   // In some cases all physical memory is not accessible by Chromium, as it can
1063   // be reserved for direct use by certain hardware. Thus, we set the limit so
1064   // that 1.6GB of reported physical memory on a 2GB device is enough to set the
1065   // limit at 16M pixels, which is a desirable value since 4K*4K is a relatively
1066   // common texture size.
1067   return base::SysInfo::AmountOfPhysicalMemory() / 25;
1068 #else
1069   return noDecodedImageByteLimit;
1070 #endif
1071 }
1072
1073 void BlinkPlatformImpl::SetFlingCurveParameters(
1074     const std::vector<float>& new_touchpad,
1075     const std::vector<float>& new_touchscreen) {
1076   fling_curve_configuration_->SetCurveParameters(new_touchpad, new_touchscreen);
1077 }
1078
1079 void BlinkPlatformImpl::SuspendSharedTimer() {
1080   ++shared_timer_suspended_;
1081 }
1082
1083 void BlinkPlatformImpl::ResumeSharedTimer() {
1084   DCHECK_GT(shared_timer_suspended_, 0);
1085
1086   // The shared timer may have fired or been adjusted while we were suspended.
1087   if (--shared_timer_suspended_ == 0 &&
1088       (!shared_timer_.IsRunning() ||
1089        shared_timer_fire_time_was_set_while_suspended_)) {
1090     shared_timer_fire_time_was_set_while_suspended_ = false;
1091     setSharedTimerFireInterval(
1092         shared_timer_fire_time_ - monotonicallyIncreasingTime());
1093   }
1094 }
1095
1096 // static
1097 void BlinkPlatformImpl::DestroyCurrentThread(void* thread) {
1098   WebThreadImplForMessageLoop* impl =
1099       static_cast<WebThreadImplForMessageLoop*>(thread);
1100   delete impl;
1101 }
1102
1103 }  // namespace content