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/metrics/histogram.h"
  17 #include "base/metrics/sparse_histogram.h"
  18 #include "base/process/process_metrics.h"
  19 #include "base/rand_util.h"
  20 #include "base/strings/string_number_conversions.h"
  21 #include "base/strings/string_util.h"
  22 #include "base/strings/utf_string_conversions.h"
  23 #include "base/synchronization/lock.h"
  24 #include "base/synchronization/waitable_event.h"
  25 #include "base/sys_info.h"
  26 #include "base/threading/platform_thread.h"
  27 #include "base/time/time.h"
  28 #include "blink/public/resources/grit/blink_image_resources.h"
  29 #include "blink/public/resources/grit/blink_resources.h"
  30 #include "content/app/resources/grit/content_resources.h"
  31 #include "content/app/strings/grit/content_strings.h"
  32 #include "content/child/bluetooth/web_bluetooth_impl.h"
  33 #include "content/child/child_thread_impl.h"
  34 #include "content/child/content_child_helpers.h"
  35 #include "content/child/geofencing/web_geofencing_provider_impl.h"
  36 #include "content/child/navigator_connect/navigator_connect_provider.h"
  37 #include "content/child/notifications/notification_dispatcher.h"
  38 #include "content/child/notifications/notification_manager.h"
  39 #include "content/child/permissions/permission_dispatcher.h"
  40 #include "content/child/permissions/permission_dispatcher_thread_proxy.h"
  41 #include "content/child/push_messaging/push_dispatcher.h"
  42 #include "content/child/push_messaging/push_provider.h"
  43 #include "content/child/scheduler/webthread_impl_for_worker_scheduler.h"
  44 #include "content/child/thread_safe_sender.h"
  45 #include "content/child/web_discardable_memory_impl.h"
  46 #include "content/child/web_url_loader_impl.h"
  47 #include "content/child/web_url_request_util.h"
  48 #include "content/child/websocket_bridge.h"
  49 #include "content/child/worker_task_runner.h"
  50 #include "content/public/common/content_client.h"
  51 #include "net/base/data_url.h"
  52 #include "net/base/mime_util.h"
  53 #include "net/base/net_errors.h"
  54 #include "net/base/net_util.h"
  55 #include "third_party/WebKit/public/platform/WebConvertableToTraceFormat.h"
  56 #include "third_party/WebKit/public/platform/WebData.h"
  57 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
  58 #include "third_party/WebKit/public/platform/WebString.h"
  59 #include "third_party/WebKit/public/platform/WebURL.h"
  60 #include "third_party/WebKit/public/platform/WebWaitableEvent.h"
  61 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  62 #include "ui/base/layout.h"
  63 #include "ui/events/gestures/blink/web_gesture_curve_impl.h"
  64 #include "ui/events/keycodes/dom4/keycode_converter.h"
  65
  66 using blink::WebData;
  67 using blink::WebFallbackThemeEngine;
  68 using blink::WebLocalizedString;
  69 using blink::WebString;
  70 using blink::WebThemeEngine;
  71 using blink::WebURL;
  72 using blink::WebURLError;
  73 using blink::WebURLLoader;
  74
  75 namespace content {
  76
  77 namespace {
  78
  79 class WebWaitableEventImpl : public blink::WebWaitableEvent {
  80  public:
  81   WebWaitableEventImpl() : impl_(new base::WaitableEvent(false, false)) {}
  82   virtual ~WebWaitableEventImpl() {}
  83
  84   virtual void wait() { impl_->Wait(); }
  85   virtual void signal() { impl_->Signal(); }
  86
  87   base::WaitableEvent* impl() {
  88     return impl_.get();
  89   }
  90
  91  private:
  92   scoped_ptr<base::WaitableEvent> impl_;
  93   DISALLOW_COPY_AND_ASSIGN(WebWaitableEventImpl);
  94 };
  95
  96 // A simple class to cache the memory usage for a given amount of time.
  97 class MemoryUsageCache {
  98  public:
  99   // Retrieves the Singleton.
 100   static MemoryUsageCache* GetInstance() {
 101     return Singleton<MemoryUsageCache>::get();
 102   }
 103
 104   MemoryUsageCache() : memory_value_(0) { Init(); }
 105   ~MemoryUsageCache() {}
 106
 107   void Init() {
 108     const unsigned int kCacheSeconds = 1;
 109     cache_valid_time_ = base::TimeDelta::FromSeconds(kCacheSeconds);
 110   }
 111
 112   // Returns true if the cached value is fresh.
 113   // Returns false if the cached value is stale, or if |cached_value| is NULL.
 114   bool IsCachedValueValid(size_t* cached_value) {
 115     base::AutoLock scoped_lock(lock_);
 116     if (!cached_value)
 117       return false;
 118     if (base::Time::Now() - last_updated_time_ > cache_valid_time_)
 119       return false;
 120     *cached_value = memory_value_;
 121     return true;
 122   };
 123
 124   // Setter for |memory_value_|, refreshes |last_updated_time_|.
 125   void SetMemoryValue(const size_t value) {
 126     base::AutoLock scoped_lock(lock_);
 127     memory_value_ = value;
 128     last_updated_time_ = base::Time::Now();
 129   }
 130
 131  private:
 132   // The cached memory value.
 133   size_t memory_value_;
 134
 135   // How long the cached value should remain valid.
 136   base::TimeDelta cache_valid_time_;
 137
 138   // The last time the cached value was updated.
 139   base::Time last_updated_time_;
 140
 141   base::Lock lock_;
 142 };
 143
 144 class ConvertableToTraceFormatWrapper
 145     : public base::trace_event::ConvertableToTraceFormat {
 146  public:
 147   explicit ConvertableToTraceFormatWrapper(
 148       const blink::WebConvertableToTraceFormat& convertable)
 149       : convertable_(convertable) {}
 150   void AppendAsTraceFormat(std::string* out) const override {
 151     *out += convertable_.asTraceFormat().utf8();
 152   }
 153
 154  private:
 155   ~ConvertableToTraceFormatWrapper() override {}
 156
 157   blink::WebConvertableToTraceFormat convertable_;
 158 };
 159
 160 }  // namespace
 161
 162 static int ToMessageID(WebLocalizedString::Name name) {
 163   switch (name) {
 164     case WebLocalizedString::AXAMPMFieldText:
 165       return IDS_AX_AM_PM_FIELD_TEXT;
 166     case WebLocalizedString::AXButtonActionVerb:
 167       return IDS_AX_BUTTON_ACTION_VERB;
 168     case WebLocalizedString::AXCalendarShowMonthSelector:
 169       return IDS_AX_CALENDAR_SHOW_MONTH_SELECTOR;
 170     case WebLocalizedString::AXCalendarShowNextMonth:
 171       return IDS_AX_CALENDAR_SHOW_NEXT_MONTH;
 172     case WebLocalizedString::AXCalendarShowPreviousMonth:
 173       return IDS_AX_CALENDAR_SHOW_PREVIOUS_MONTH;
 174     case WebLocalizedString::AXCalendarWeekDescription:
 175       return IDS_AX_CALENDAR_WEEK_DESCRIPTION;
 176     case WebLocalizedString::AXCheckedCheckBoxActionVerb:
 177       return IDS_AX_CHECKED_CHECK_BOX_ACTION_VERB;
 178     case WebLocalizedString::AXDateTimeFieldEmptyValueText:
 179       return IDS_AX_DATE_TIME_FIELD_EMPTY_VALUE_TEXT;
 180     case WebLocalizedString::AXDayOfMonthFieldText:
 181       return IDS_AX_DAY_OF_MONTH_FIELD_TEXT;
 182     case WebLocalizedString::AXHeadingText:
 183       return IDS_AX_ROLE_HEADING;
 184     case WebLocalizedString::AXHourFieldText:
 185       return IDS_AX_HOUR_FIELD_TEXT;
 186     case WebLocalizedString::AXImageMapText:
 187       return IDS_AX_ROLE_IMAGE_MAP;
 188     case WebLocalizedString::AXLinkActionVerb:
 189       return IDS_AX_LINK_ACTION_VERB;
 190     case WebLocalizedString::AXLinkText:
 191       return IDS_AX_ROLE_LINK;
 192     case WebLocalizedString::AXListMarkerText:
 193       return IDS_AX_ROLE_LIST_MARKER;
 194     case WebLocalizedString::AXMediaDefault:
 195       return IDS_AX_MEDIA_DEFAULT;
 196     case WebLocalizedString::AXMediaAudioElement:
 197       return IDS_AX_MEDIA_AUDIO_ELEMENT;
 198     case WebLocalizedString::AXMediaVideoElement:
 199       return IDS_AX_MEDIA_VIDEO_ELEMENT;
 200     case WebLocalizedString::AXMediaMuteButton:
 201       return IDS_AX_MEDIA_MUTE_BUTTON;
 202     case WebLocalizedString::AXMediaUnMuteButton:
 203       return IDS_AX_MEDIA_UNMUTE_BUTTON;
 204     case WebLocalizedString::AXMediaPlayButton:
 205       return IDS_AX_MEDIA_PLAY_BUTTON;
 206     case WebLocalizedString::AXMediaPauseButton:
 207       return IDS_AX_MEDIA_PAUSE_BUTTON;
 208     case WebLocalizedString::AXMediaSlider:
 209       return IDS_AX_MEDIA_SLIDER;
 210     case WebLocalizedString::AXMediaSliderThumb:
 211       return IDS_AX_MEDIA_SLIDER_THUMB;
 212     case WebLocalizedString::AXMediaCurrentTimeDisplay:
 213       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY;
 214     case WebLocalizedString::AXMediaTimeRemainingDisplay:
 215       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY;
 216     case WebLocalizedString::AXMediaStatusDisplay:
 217       return IDS_AX_MEDIA_STATUS_DISPLAY;
 218     case WebLocalizedString::AXMediaEnterFullscreenButton:
 219       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON;
 220     case WebLocalizedString::AXMediaExitFullscreenButton:
 221       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON;
 222     case WebLocalizedString::AXMediaShowClosedCaptionsButton:
 223       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON;
 224     case WebLocalizedString::AXMediaHideClosedCaptionsButton:
 225       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON;
 226     case WebLocalizedString::AxMediaCastOffButton:
 227       return IDS_AX_MEDIA_CAST_OFF_BUTTON;
 228     case WebLocalizedString::AxMediaCastOnButton:
 229       return IDS_AX_MEDIA_CAST_ON_BUTTON;
 230     case WebLocalizedString::AXMediaAudioElementHelp:
 231       return IDS_AX_MEDIA_AUDIO_ELEMENT_HELP;
 232     case WebLocalizedString::AXMediaVideoElementHelp:
 233       return IDS_AX_MEDIA_VIDEO_ELEMENT_HELP;
 234     case WebLocalizedString::AXMediaMuteButtonHelp:
 235       return IDS_AX_MEDIA_MUTE_BUTTON_HELP;
 236     case WebLocalizedString::AXMediaUnMuteButtonHelp:
 237       return IDS_AX_MEDIA_UNMUTE_BUTTON_HELP;
 238     case WebLocalizedString::AXMediaPlayButtonHelp:
 239       return IDS_AX_MEDIA_PLAY_BUTTON_HELP;
 240     case WebLocalizedString::AXMediaPauseButtonHelp:
 241       return IDS_AX_MEDIA_PAUSE_BUTTON_HELP;
 242     case WebLocalizedString::AXMediaAudioSliderHelp:
 243       return IDS_AX_MEDIA_AUDIO_SLIDER_HELP;
 244     case WebLocalizedString::AXMediaVideoSliderHelp:
 245       return IDS_AX_MEDIA_VIDEO_SLIDER_HELP;
 246     case WebLocalizedString::AXMediaSliderThumbHelp:
 247       return IDS_AX_MEDIA_SLIDER_THUMB_HELP;
 248     case WebLocalizedString::AXMediaCurrentTimeDisplayHelp:
 249       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY_HELP;
 250     case WebLocalizedString::AXMediaTimeRemainingDisplayHelp:
 251       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY_HELP;
 252     case WebLocalizedString::AXMediaStatusDisplayHelp:
 253       return IDS_AX_MEDIA_STATUS_DISPLAY_HELP;
 254     case WebLocalizedString::AXMediaEnterFullscreenButtonHelp:
 255       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON_HELP;
 256     case WebLocalizedString::AXMediaExitFullscreenButtonHelp:
 257       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON_HELP;
 258     case WebLocalizedString::AXMediaShowClosedCaptionsButtonHelp:
 259       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON_HELP;
 260     case WebLocalizedString::AXMediaHideClosedCaptionsButtonHelp:
 261       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON_HELP;
 262     case WebLocalizedString::AxMediaCastOffButtonHelp:
 263       return IDS_AX_MEDIA_CAST_OFF_BUTTON_HELP;
 264     case WebLocalizedString::AxMediaCastOnButtonHelp:
 265       return IDS_AX_MEDIA_CAST_ON_BUTTON_HELP;
 266     case WebLocalizedString::AXMillisecondFieldText:
 267       return IDS_AX_MILLISECOND_FIELD_TEXT;
 268     case WebLocalizedString::AXMinuteFieldText:
 269       return IDS_AX_MINUTE_FIELD_TEXT;
 270     case WebLocalizedString::AXMonthFieldText:
 271       return IDS_AX_MONTH_FIELD_TEXT;
 272     case WebLocalizedString::AXRadioButtonActionVerb:
 273       return IDS_AX_RADIO_BUTTON_ACTION_VERB;
 274     case WebLocalizedString::AXSecondFieldText:
 275       return IDS_AX_SECOND_FIELD_TEXT;
 276     case WebLocalizedString::AXTextFieldActionVerb:
 277       return IDS_AX_TEXT_FIELD_ACTION_VERB;
 278     case WebLocalizedString::AXUncheckedCheckBoxActionVerb:
 279       return IDS_AX_UNCHECKED_CHECK_BOX_ACTION_VERB;
 280     case WebLocalizedString::AXWebAreaText:
 281       return IDS_AX_ROLE_WEB_AREA;
 282     case WebLocalizedString::AXWeekOfYearFieldText:
 283       return IDS_AX_WEEK_OF_YEAR_FIELD_TEXT;
 284     case WebLocalizedString::AXYearFieldText:
 285       return IDS_AX_YEAR_FIELD_TEXT;
 286     case WebLocalizedString::CalendarClear:
 287       return IDS_FORM_CALENDAR_CLEAR;
 288     case WebLocalizedString::CalendarToday:
 289       return IDS_FORM_CALENDAR_TODAY;
 290     case WebLocalizedString::DateFormatDayInMonthLabel:
 291       return IDS_FORM_DATE_FORMAT_DAY_IN_MONTH;
 292     case WebLocalizedString::DateFormatMonthLabel:
 293       return IDS_FORM_DATE_FORMAT_MONTH;
 294     case WebLocalizedString::DateFormatYearLabel:
 295       return IDS_FORM_DATE_FORMAT_YEAR;
 296     case WebLocalizedString::DetailsLabel:
 297       return IDS_DETAILS_WITHOUT_SUMMARY_LABEL;
 298     case WebLocalizedString::FileButtonChooseFileLabel:
 299       return IDS_FORM_FILE_BUTTON_LABEL;
 300     case WebLocalizedString::FileButtonChooseMultipleFilesLabel:
 301       return IDS_FORM_MULTIPLE_FILES_BUTTON_LABEL;
 302     case WebLocalizedString::FileButtonNoFileSelectedLabel:
 303       return IDS_FORM_FILE_NO_FILE_LABEL;
 304     case WebLocalizedString::InputElementAltText:
 305       return IDS_FORM_INPUT_ALT;
 306     case WebLocalizedString::KeygenMenuHighGradeKeySize:
 307       return IDS_KEYGEN_HIGH_GRADE_KEY;
 308     case WebLocalizedString::KeygenMenuMediumGradeKeySize:
 309       return IDS_KEYGEN_MED_GRADE_KEY;
 310     case WebLocalizedString::MissingPluginText:
 311       return IDS_PLUGIN_INITIALIZATION_ERROR;
 312     case WebLocalizedString::MultipleFileUploadText:
 313       return IDS_FORM_FILE_MULTIPLE_UPLOAD;
 314     case WebLocalizedString::OtherColorLabel:
 315       return IDS_FORM_OTHER_COLOR_LABEL;
 316     case WebLocalizedString::OtherDateLabel:
 317         return IDS_FORM_OTHER_DATE_LABEL;
 318     case WebLocalizedString::OtherMonthLabel:
 319       return IDS_FORM_OTHER_MONTH_LABEL;
 320     case WebLocalizedString::OtherTimeLabel:
 321       return IDS_FORM_OTHER_TIME_LABEL;
 322     case WebLocalizedString::OtherWeekLabel:
 323       return IDS_FORM_OTHER_WEEK_LABEL;
 324     case WebLocalizedString::PlaceholderForDayOfMonthField:
 325       return IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD;
 326     case WebLocalizedString::PlaceholderForMonthField:
 327       return IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD;
 328     case WebLocalizedString::PlaceholderForYearField:
 329       return IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD;
 330     case WebLocalizedString::ResetButtonDefaultLabel:
 331       return IDS_FORM_RESET_LABEL;
 332     case WebLocalizedString::SearchableIndexIntroduction:
 333       return IDS_SEARCHABLE_INDEX_INTRO;
 334     case WebLocalizedString::SearchMenuClearRecentSearchesText:
 335       return IDS_RECENT_SEARCHES_CLEAR;
 336     case WebLocalizedString::SearchMenuNoRecentSearchesText:
 337       return IDS_RECENT_SEARCHES_NONE;
 338     case WebLocalizedString::SearchMenuRecentSearchesText:
 339       return IDS_RECENT_SEARCHES;
 340     case WebLocalizedString::SelectMenuListText:
 341       return IDS_FORM_SELECT_MENU_LIST_TEXT;
 342     case WebLocalizedString::SubmitButtonDefaultLabel:
 343       return IDS_FORM_SUBMIT_LABEL;
 344     case WebLocalizedString::ThisMonthButtonLabel:
 345       return IDS_FORM_THIS_MONTH_LABEL;
 346     case WebLocalizedString::ThisWeekButtonLabel:
 347       return IDS_FORM_THIS_WEEK_LABEL;
 348     case WebLocalizedString::ValidationBadInputForDateTime:
 349       return IDS_FORM_VALIDATION_BAD_INPUT_DATETIME;
 350     case WebLocalizedString::ValidationBadInputForNumber:
 351       return IDS_FORM_VALIDATION_BAD_INPUT_NUMBER;
 352     case WebLocalizedString::ValidationPatternMismatch:
 353       return IDS_FORM_VALIDATION_PATTERN_MISMATCH;
 354     case WebLocalizedString::ValidationRangeOverflow:
 355       return IDS_FORM_VALIDATION_RANGE_OVERFLOW;
 356     case WebLocalizedString::ValidationRangeOverflowDateTime:
 357       return IDS_FORM_VALIDATION_RANGE_OVERFLOW_DATETIME;
 358     case WebLocalizedString::ValidationRangeUnderflow:
 359       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW;
 360     case WebLocalizedString::ValidationRangeUnderflowDateTime:
 361       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW_DATETIME;
 362     case WebLocalizedString::ValidationStepMismatch:
 363       return IDS_FORM_VALIDATION_STEP_MISMATCH;
 364     case WebLocalizedString::ValidationStepMismatchCloseToLimit:
 365       return IDS_FORM_VALIDATION_STEP_MISMATCH_CLOSE_TO_LIMIT;
 366     case WebLocalizedString::ValidationTooLong:
 367       return IDS_FORM_VALIDATION_TOO_LONG;
 368     case WebLocalizedString::ValidationTooShort:
 369       return IDS_FORM_VALIDATION_TOO_SHORT;
 370     case WebLocalizedString::ValidationTypeMismatch:
 371       return IDS_FORM_VALIDATION_TYPE_MISMATCH;
 372     case WebLocalizedString::ValidationTypeMismatchForEmail:
 373       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL;
 374     case WebLocalizedString::ValidationTypeMismatchForEmailEmpty:
 375       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY;
 376     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain:
 377       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_DOMAIN;
 378     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal:
 379       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_LOCAL;
 380     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain:
 381       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOMAIN;
 382     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots:
 383       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOTS;
 384     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal:
 385       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_LOCAL;
 386     case WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign:
 387       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_NO_AT_SIGN;
 388     case WebLocalizedString::ValidationTypeMismatchForMultipleEmail:
 389       return IDS_FORM_VALIDATION_TYPE_MISMATCH_MULTIPLE_EMAIL;
 390     case WebLocalizedString::ValidationTypeMismatchForURL:
 391       return IDS_FORM_VALIDATION_TYPE_MISMATCH_URL;
 392     case WebLocalizedString::ValidationValueMissing:
 393       return IDS_FORM_VALIDATION_VALUE_MISSING;
 394     case WebLocalizedString::ValidationValueMissingForCheckbox:
 395       return IDS_FORM_VALIDATION_VALUE_MISSING_CHECKBOX;
 396     case WebLocalizedString::ValidationValueMissingForFile:
 397       return IDS_FORM_VALIDATION_VALUE_MISSING_FILE;
 398     case WebLocalizedString::ValidationValueMissingForMultipleFile:
 399       return IDS_FORM_VALIDATION_VALUE_MISSING_MULTIPLE_FILE;
 400     case WebLocalizedString::ValidationValueMissingForRadio:
 401       return IDS_FORM_VALIDATION_VALUE_MISSING_RADIO;
 402     case WebLocalizedString::ValidationValueMissingForSelect:
 403       return IDS_FORM_VALIDATION_VALUE_MISSING_SELECT;
 404     case WebLocalizedString::WeekFormatTemplate:
 405       return IDS_FORM_INPUT_WEEK_TEMPLATE;
 406     case WebLocalizedString::WeekNumberLabel:
 407       return IDS_FORM_WEEK_NUMBER_LABEL;
 408     // This "default:" line exists to avoid compile warnings about enum
 409     // coverage when we add a new symbol to WebLocalizedString.h in WebKit.
 410     // After a planned WebKit patch is landed, we need to add a case statement
 411     // for the added symbol here.
 412     default:
 413       break;
 414   }
 415   return -1;
 416 }
 417
 418 BlinkPlatformImpl::BlinkPlatformImpl()
 419     : main_thread_task_runner_(base::MessageLoopProxy::current()),
 420       shared_timer_func_(NULL),
 421       shared_timer_fire_time_(0.0),
 422       shared_timer_fire_time_was_set_while_suspended_(false),
 423       shared_timer_suspended_(0) {
 424   InternalInit();
 425 }
 426
 427 BlinkPlatformImpl::BlinkPlatformImpl(
 428     scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner)
 429     : main_thread_task_runner_(main_thread_task_runner),
 430       shared_timer_func_(NULL),
 431       shared_timer_fire_time_(0.0),
 432       shared_timer_fire_time_was_set_while_suspended_(false),
 433       shared_timer_suspended_(0) {
 434   // TODO(alexclarke): Use c++11 delegated constructors when allowed.
 435   InternalInit();
 436 }
 437
 438 void BlinkPlatformImpl::InternalInit() {
 439   // ChildThread may not exist in some tests.
 440   if (ChildThreadImpl::current()) {
 441     geofencing_provider_.reset(new WebGeofencingProviderImpl(
 442         ChildThreadImpl::current()->thread_safe_sender()));
 443     bluetooth_.reset(
 444         new WebBluetoothImpl(ChildThreadImpl::current()->thread_safe_sender()));
 445     thread_safe_sender_ = ChildThreadImpl::current()->thread_safe_sender();
 446     notification_dispatcher_ =
 447         ChildThreadImpl::current()->notification_dispatcher();
 448     push_dispatcher_ = ChildThreadImpl::current()->push_dispatcher();
 449     permission_client_.reset(new PermissionDispatcher(
 450         ChildThreadImpl::current()->service_registry()));
 451   }
 452
 453   if (main_thread_task_runner_.get()) {
 454     shared_timer_.SetTaskRunner(main_thread_task_runner_);
 455   }
 456 }
 457
 458 void BlinkPlatformImpl::UpdateWebThreadTLS(blink::WebThread* thread) {
 459   DCHECK(!current_thread_slot_.Get());
 460   current_thread_slot_.Set(thread);
 461 }
 462
 463 BlinkPlatformImpl::~BlinkPlatformImpl() {
 464 }
 465
 466 WebURLLoader* BlinkPlatformImpl::createURLLoader() {
 467   ChildThreadImpl* child_thread = ChildThreadImpl::current();
 468   // There may be no child thread in RenderViewTests.  These tests can still use
 469   // data URLs to bypass the ResourceDispatcher.
 470   return new WebURLLoaderImpl(
 471       child_thread ? child_thread->resource_dispatcher() : NULL,
 472       MainTaskRunnerForCurrentThread());
 473 }
 474
 475 blink::WebSocketHandle* BlinkPlatformImpl::createWebSocketHandle() {
 476   return new WebSocketBridge;
 477 }
 478
 479 WebString BlinkPlatformImpl::userAgent() {
 480   return WebString::fromUTF8(GetContentClient()->GetUserAgent());
 481 }
 482
 483 WebData BlinkPlatformImpl::parseDataURL(const WebURL& url,
 484                                         WebString& mimetype_out,
 485                                         WebString& charset_out) {
 486   std::string mime_type, char_set, data;
 487   if (net::DataURL::Parse(url, &mime_type, &char_set, &data)
 488       && net::IsSupportedMimeType(mime_type)) {
 489     mimetype_out = WebString::fromUTF8(mime_type);
 490     charset_out = WebString::fromUTF8(char_set);
 491     return data;
 492   }
 493   return WebData();
 494 }
 495
 496 WebURLError BlinkPlatformImpl::cancelledError(
 497     const WebURL& unreachableURL) const {
 498   return CreateWebURLError(unreachableURL, false, net::ERR_ABORTED);
 499 }
 500
 501 bool BlinkPlatformImpl::isReservedIPAddress(
 502     const blink::WebString& host) const {
 503   net::IPAddressNumber address;
 504   if (!net::ParseURLHostnameToNumber(host.utf8(), &address))
 505     return false;
 506   return net::IsIPAddressReserved(address);
 507 }
 508
 509 bool BlinkPlatformImpl::portAllowed(const blink::WebURL& url) const {
 510   GURL gurl = GURL(url);
 511   if (!gurl.has_port())
 512     return true;
 513   int port = gurl.IntPort();
 514   if (net::IsPortAllowedByOverride(port))
 515     return true;
 516   if (gurl.SchemeIs("ftp"))
 517     return net::IsPortAllowedByFtp(port);
 518   return net::IsPortAllowedByDefault(port);
 519 }
 520
 521 blink::WebThread* BlinkPlatformImpl::createThread(const char* name) {
 522   WebThreadImplForWorkerScheduler* thread =
 523       new WebThreadImplForWorkerScheduler(name);
 524   thread->TaskRunner()->PostTask(
 525       FROM_HERE, base::Bind(&BlinkPlatformImpl::UpdateWebThreadTLS,
 526                             base::Unretained(this), thread));
 527   return thread;
 528 }
 529
 530 blink::WebThread* BlinkPlatformImpl::currentThread() {
 531   return static_cast<blink::WebThread*>(current_thread_slot_.Get());
 532 }
 533
 534 void BlinkPlatformImpl::yieldCurrentThread() {
 535   base::PlatformThread::YieldCurrentThread();
 536 }
 537
 538 blink::WebWaitableEvent* BlinkPlatformImpl::createWaitableEvent() {
 539   return new WebWaitableEventImpl();
 540 }
 541
 542 blink::WebWaitableEvent* BlinkPlatformImpl::waitMultipleEvents(
 543     const blink::WebVector<blink::WebWaitableEvent*>& web_events) {
 544   std::vector<base::WaitableEvent*> events;
 545   for (size_t i = 0; i < web_events.size(); ++i)
 546     events.push_back(static_cast<WebWaitableEventImpl*>(web_events[i])->impl());
 547   size_t idx = base::WaitableEvent::WaitMany(
 548       vector_as_array(&events), events.size());
 549   DCHECK_LT(idx, web_events.size());
 550   return web_events[idx];
 551 }
 552
 553 void BlinkPlatformImpl::decrementStatsCounter(const char* name) {
 554 }
 555
 556 void BlinkPlatformImpl::incrementStatsCounter(const char* name) {
 557 }
 558
 559 void BlinkPlatformImpl::histogramCustomCounts(
 560     const char* name, int sample, int min, int max, int bucket_count) {
 561   // Copied from histogram macro, but without the static variable caching
 562   // the histogram because name is dynamic.
 563   base::HistogramBase* counter =
 564       base::Histogram::FactoryGet(name, min, max, bucket_count,
 565           base::HistogramBase::kUmaTargetedHistogramFlag);
 566   DCHECK_EQ(name, counter->histogram_name());
 567   counter->Add(sample);
 568 }
 569
 570 void BlinkPlatformImpl::histogramEnumeration(
 571     const char* name, int sample, int boundary_value) {
 572   // Copied from histogram macro, but without the static variable caching
 573   // the histogram because name is dynamic.
 574   base::HistogramBase* counter =
 575       base::LinearHistogram::FactoryGet(name, 1, boundary_value,
 576           boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag);
 577   DCHECK_EQ(name, counter->histogram_name());
 578   counter->Add(sample);
 579 }
 580
 581 void BlinkPlatformImpl::histogramSparse(const char* name, int sample) {
 582   // For sparse histograms, we can use the macro, as it does not incorporate a
 583   // static.
 584   UMA_HISTOGRAM_SPARSE_SLOWLY(name, sample);
 585 }
 586
 587 const unsigned char* BlinkPlatformImpl::getTraceCategoryEnabledFlag(
 588     const char* category_group) {
 589   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 590 }
 591
 592 blink::Platform::TraceEventAPIAtomicWord*
 593 BlinkPlatformImpl::getTraceSamplingState(const unsigned thread_bucket) {
 594   switch (thread_bucket) {
 595     case 0:
 596       return reinterpret_cast<blink::Platform::TraceEventAPIAtomicWord*>(
 597           &TRACE_EVENT_API_THREAD_BUCKET(0));
 598     case 1:
 599       return reinterpret_cast<blink::Platform::TraceEventAPIAtomicWord*>(
 600           &TRACE_EVENT_API_THREAD_BUCKET(1));
 601     case 2:
 602       return reinterpret_cast<blink::Platform::TraceEventAPIAtomicWord*>(
 603           &TRACE_EVENT_API_THREAD_BUCKET(2));
 604     default:
 605       NOTREACHED() << "Unknown thread bucket type.";
 606   }
 607   return NULL;
 608 }
 609
 610 static_assert(
 611     sizeof(blink::Platform::TraceEventHandle) ==
 612         sizeof(base::trace_event::TraceEventHandle),
 613     "TraceEventHandle types must be same size");
 614
 615 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 616     char phase,
 617     const unsigned char* category_group_enabled,
 618     const char* name,
 619     unsigned long long id,
 620     double timestamp,
 621     int num_args,
 622     const char** arg_names,
 623     const unsigned char* arg_types,
 624     const unsigned long long* arg_values,
 625     unsigned char flags) {
 626   base::TimeTicks timestamp_tt = base::TimeTicks::FromInternalValue(
 627       static_cast<int64>(timestamp * base::Time::kMicrosecondsPerSecond));
 628   base::trace_event::TraceEventHandle handle =
 629       TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
 630           phase, category_group_enabled, name, id,
 631           base::PlatformThread::CurrentId(),
 632           timestamp_tt,
 633           num_args, arg_names, arg_types, arg_values, NULL, flags);
 634   blink::Platform::TraceEventHandle result;
 635   memcpy(&result, &handle, sizeof(result));
 636   return result;
 637 }
 638
 639 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 640     char phase,
 641     const unsigned char* category_group_enabled,
 642     const char* name,
 643     unsigned long long id,
 644     double timestamp,
 645     int num_args,
 646     const char** arg_names,
 647     const unsigned char* arg_types,
 648     const unsigned long long* arg_values,
 649     const blink::WebConvertableToTraceFormat* convertable_values,
 650     unsigned char flags) {
 651   scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 652       convertable_wrappers[2];
 653   if (convertable_values) {
 654     size_t size = std::min(static_cast<size_t>(num_args),
 655                            arraysize(convertable_wrappers));
 656     for (size_t i = 0; i < size; ++i) {
 657       if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) {
 658         convertable_wrappers[i] =
 659             new ConvertableToTraceFormatWrapper(convertable_values[i]);
 660       }
 661     }
 662   }
 663   base::TimeTicks timestamp_tt = base::TimeTicks::FromInternalValue(
 664       static_cast<int64>(timestamp * base::Time::kMicrosecondsPerSecond));
 665   base::trace_event::TraceEventHandle handle =
 666       TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(phase,
 667                                       category_group_enabled,
 668                                       name,
 669                                       id,
 670                                       base::PlatformThread::CurrentId(),
 671                                       timestamp_tt,
 672                                       num_args,
 673                                       arg_names,
 674                                       arg_types,
 675                                       arg_values,
 676                                       convertable_wrappers,
 677                                       flags);
 678   blink::Platform::TraceEventHandle result;
 679   memcpy(&result, &handle, sizeof(result));
 680   return result;
 681 }
 682
 683 void BlinkPlatformImpl::updateTraceEventDuration(
 684     const unsigned char* category_group_enabled,
 685     const char* name,
 686     TraceEventHandle handle) {
 687   base::trace_event::TraceEventHandle traceEventHandle;
 688   memcpy(&traceEventHandle, &handle, sizeof(handle));
 689   TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
 690       category_group_enabled, name, traceEventHandle);
 691 }
 692
 693 namespace {
 694
 695 WebData loadAudioSpatializationResource(const char* name) {
 696 #ifdef IDR_AUDIO_SPATIALIZATION_COMPOSITE
 697   if (!strcmp(name, "Composite")) {
 698     base::StringPiece resource = GetContentClient()->GetDataResource(
 699         IDR_AUDIO_SPATIALIZATION_COMPOSITE, ui::SCALE_FACTOR_NONE);
 700     return WebData(resource.data(), resource.size());
 701   }
 702 #endif
 703
 704 #ifdef IDR_AUDIO_SPATIALIZATION_T000_P000
 705   const size_t kExpectedSpatializationNameLength = 31;
 706   if (strlen(name) != kExpectedSpatializationNameLength) {
 707     return WebData();
 708   }
 709
 710   // Extract the azimuth and elevation from the resource name.
 711   int azimuth = 0;
 712   int elevation = 0;
 713   int values_parsed =
 714       sscanf(name, "IRC_Composite_C_R0195_T%3d_P%3d", &azimuth, &elevation);
 715   if (values_parsed != 2) {
 716     return WebData();
 717   }
 718
 719   // The resource index values go through the elevations first, then azimuths.
 720   const int kAngleSpacing = 15;
 721
 722   // 0 <= elevation <= 90 (or 315 <= elevation <= 345)
 723   // in increments of 15 degrees.
 724   int elevation_index =
 725       elevation <= 90 ? elevation / kAngleSpacing :
 726       7 + (elevation - 315) / kAngleSpacing;
 727   bool is_elevation_index_good = 0 <= elevation_index && elevation_index < 10;
 728
 729   // 0 <= azimuth < 360 in increments of 15 degrees.
 730   int azimuth_index = azimuth / kAngleSpacing;
 731   bool is_azimuth_index_good = 0 <= azimuth_index && azimuth_index < 24;
 732
 733   const int kNumberOfElevations = 10;
 734   const int kNumberOfAudioResources = 240;
 735   int resource_index = kNumberOfElevations * azimuth_index + elevation_index;
 736   bool is_resource_index_good = 0 <= resource_index &&
 737       resource_index < kNumberOfAudioResources;
 738
 739   if (is_azimuth_index_good && is_elevation_index_good &&
 740       is_resource_index_good) {
 741     const int kFirstAudioResourceIndex = IDR_AUDIO_SPATIALIZATION_T000_P000;
 742     base::StringPiece resource = GetContentClient()->GetDataResource(
 743         kFirstAudioResourceIndex + resource_index, ui::SCALE_FACTOR_NONE);
 744     return WebData(resource.data(), resource.size());
 745   }
 746 #endif  // IDR_AUDIO_SPATIALIZATION_T000_P000
 747
 748   NOTREACHED();
 749   return WebData();
 750 }
 751
 752 struct DataResource {
 753   const char* name;
 754   int id;
 755   ui::ScaleFactor scale_factor;
 756 };
 757
 758 const DataResource kDataResources[] = {
 759     {"missingImage", IDR_BROKENIMAGE, ui::SCALE_FACTOR_100P},
 760     {"missingImage@2x", IDR_BROKENIMAGE, ui::SCALE_FACTOR_200P},
 761     {"mediaplayerPause", IDR_MEDIAPLAYER_PAUSE_BUTTON, ui::SCALE_FACTOR_100P},
 762     {"mediaplayerPauseHover",
 763      IDR_MEDIAPLAYER_PAUSE_BUTTON_HOVER,
 764      ui::SCALE_FACTOR_100P},
 765     {"mediaplayerPauseDown",
 766      IDR_MEDIAPLAYER_PAUSE_BUTTON_DOWN,
 767      ui::SCALE_FACTOR_100P},
 768     {"mediaplayerPlay", IDR_MEDIAPLAYER_PLAY_BUTTON, ui::SCALE_FACTOR_100P},
 769     {"mediaplayerPlayHover",
 770      IDR_MEDIAPLAYER_PLAY_BUTTON_HOVER,
 771      ui::SCALE_FACTOR_100P},
 772     {"mediaplayerPlayDown",
 773      IDR_MEDIAPLAYER_PLAY_BUTTON_DOWN,
 774      ui::SCALE_FACTOR_100P},
 775     {"mediaplayerPlayDisabled",
 776      IDR_MEDIAPLAYER_PLAY_BUTTON_DISABLED,
 777      ui::SCALE_FACTOR_100P},
 778     {"mediaplayerSoundLevel3",
 779      IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON,
 780      ui::SCALE_FACTOR_100P},
 781     {"mediaplayerSoundLevel3Hover",
 782      IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_HOVER,
 783      ui::SCALE_FACTOR_100P},
 784     {"mediaplayerSoundLevel3Down",
 785      IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_DOWN,
 786      ui::SCALE_FACTOR_100P},
 787     {"mediaplayerSoundLevel2",
 788      IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON,
 789      ui::SCALE_FACTOR_100P},
 790     {"mediaplayerSoundLevel2Hover",
 791      IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_HOVER,
 792      ui::SCALE_FACTOR_100P},
 793     {"mediaplayerSoundLevel2Down",
 794      IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_DOWN,
 795      ui::SCALE_FACTOR_100P},
 796     {"mediaplayerSoundLevel1",
 797      IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON,
 798      ui::SCALE_FACTOR_100P},
 799     {"mediaplayerSoundLevel1Hover",
 800      IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_HOVER,
 801      ui::SCALE_FACTOR_100P},
 802     {"mediaplayerSoundLevel1Down",
 803      IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_DOWN,
 804      ui::SCALE_FACTOR_100P},
 805     {"mediaplayerSoundLevel0",
 806      IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON,
 807      ui::SCALE_FACTOR_100P},
 808     {"mediaplayerSoundLevel0Hover",
 809      IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_HOVER,
 810      ui::SCALE_FACTOR_100P},
 811     {"mediaplayerSoundLevel0Down",
 812      IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_DOWN,
 813      ui::SCALE_FACTOR_100P},
 814     {"mediaplayerSoundDisabled",
 815      IDR_MEDIAPLAYER_SOUND_DISABLED,
 816      ui::SCALE_FACTOR_100P},
 817     {"mediaplayerSliderThumb",
 818      IDR_MEDIAPLAYER_SLIDER_THUMB,
 819      ui::SCALE_FACTOR_100P},
 820     {"mediaplayerSliderThumbHover",
 821      IDR_MEDIAPLAYER_SLIDER_THUMB_HOVER,
 822      ui::SCALE_FACTOR_100P},
 823     {"mediaplayerSliderThumbDown",
 824      IDR_MEDIAPLAYER_SLIDER_THUMB_DOWN,
 825      ui::SCALE_FACTOR_100P},
 826     {"mediaplayerVolumeSliderThumb",
 827      IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB,
 828      ui::SCALE_FACTOR_100P},
 829     {"mediaplayerVolumeSliderThumbHover",
 830      IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_HOVER,
 831      ui::SCALE_FACTOR_100P},
 832     {"mediaplayerVolumeSliderThumbDown",
 833      IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DOWN,
 834      ui::SCALE_FACTOR_100P},
 835     {"mediaplayerVolumeSliderThumbDisabled",
 836      IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DISABLED,
 837      ui::SCALE_FACTOR_100P},
 838     {"mediaplayerClosedCaption",
 839      IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON,
 840      ui::SCALE_FACTOR_100P},
 841     {"mediaplayerClosedCaptionHover",
 842      IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_HOVER,
 843      ui::SCALE_FACTOR_100P},
 844     {"mediaplayerClosedCaptionDown",
 845      IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DOWN,
 846      ui::SCALE_FACTOR_100P},
 847     {"mediaplayerClosedCaptionDisabled",
 848      IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DISABLED,
 849      ui::SCALE_FACTOR_100P},
 850     {"mediaplayerFullscreen",
 851      IDR_MEDIAPLAYER_FULLSCREEN_BUTTON,
 852      ui::SCALE_FACTOR_100P},
 853     {"mediaplayerFullscreenHover",
 854      IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_HOVER,
 855      ui::SCALE_FACTOR_100P},
 856     {"mediaplayerFullscreenDown",
 857      IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DOWN,
 858      ui::SCALE_FACTOR_100P},
 859     {"mediaplayerCastOff",
 860      IDR_MEDIAPLAYER_CAST_BUTTON_OFF,
 861      ui::SCALE_FACTOR_100P},
 862     {"mediaplayerCastOn",
 863      IDR_MEDIAPLAYER_CAST_BUTTON_ON,
 864      ui::SCALE_FACTOR_100P},
 865     {"mediaplayerFullscreenDisabled",
 866      IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DISABLED,
 867      ui::SCALE_FACTOR_100P},
 868     {"mediaplayerOverlayCastOff",
 869      IDR_MEDIAPLAYER_OVERLAY_CAST_BUTTON_OFF,
 870      ui::SCALE_FACTOR_100P},
 871     {"mediaplayerOverlayPlay",
 872      IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON,
 873      ui::SCALE_FACTOR_100P},
 874     {"panIcon", IDR_PAN_SCROLL_ICON, ui::SCALE_FACTOR_100P},
 875     {"searchCancel", IDR_SEARCH_CANCEL, ui::SCALE_FACTOR_100P},
 876     {"searchCancelPressed", IDR_SEARCH_CANCEL_PRESSED, ui::SCALE_FACTOR_100P},
 877     {"searchMagnifier", IDR_SEARCH_MAGNIFIER, ui::SCALE_FACTOR_100P},
 878     {"searchMagnifierResults",
 879      IDR_SEARCH_MAGNIFIER_RESULTS,
 880      ui::SCALE_FACTOR_100P},
 881     {"textAreaResizeCorner", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_100P},
 882     {"textAreaResizeCorner@2x", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_200P},
 883     {"generatePassword", IDR_PASSWORD_GENERATION_ICON, ui::SCALE_FACTOR_100P},
 884     {"generatePasswordHover",
 885      IDR_PASSWORD_GENERATION_ICON_HOVER,
 886      ui::SCALE_FACTOR_100P},
 887     {"html.css", IDR_UASTYLE_HTML_CSS, ui::SCALE_FACTOR_NONE},
 888     {"quirks.css", IDR_UASTYLE_QUIRKS_CSS, ui::SCALE_FACTOR_NONE},
 889     {"view-source.css", IDR_UASTYLE_VIEW_SOURCE_CSS, ui::SCALE_FACTOR_NONE},
 890     {"themeChromium.css",
 891      IDR_UASTYLE_THEME_CHROMIUM_CSS,
 892      ui::SCALE_FACTOR_NONE},
 893 #if defined(OS_ANDROID)
 894     {"themeChromiumAndroid.css",
 895      IDR_UASTYLE_THEME_CHROMIUM_ANDROID_CSS,
 896      ui::SCALE_FACTOR_NONE},
 897     {"mediaControlsAndroid.css",
 898      IDR_UASTYLE_MEDIA_CONTROLS_ANDROID_CSS,
 899      ui::SCALE_FACTOR_NONE},
 900 #endif
 901 #if !defined(OS_WIN)
 902     {"themeChromiumLinux.css",
 903      IDR_UASTYLE_THEME_CHROMIUM_LINUX_CSS,
 904      ui::SCALE_FACTOR_NONE},
 905 #endif
 906     {"themeChromiumSkia.css",
 907      IDR_UASTYLE_THEME_CHROMIUM_SKIA_CSS,
 908      ui::SCALE_FACTOR_NONE},
 909     {"themeInputMultipleFields.css",
 910      IDR_UASTYLE_THEME_INPUT_MULTIPLE_FIELDS_CSS,
 911      ui::SCALE_FACTOR_NONE},
 912 #if defined(OS_MACOSX)
 913     {"themeMac.css", IDR_UASTYLE_THEME_MAC_CSS, ui::SCALE_FACTOR_NONE},
 914 #endif
 915     {"themeWin.css", IDR_UASTYLE_THEME_WIN_CSS, ui::SCALE_FACTOR_NONE},
 916     {"themeWinQuirks.css",
 917      IDR_UASTYLE_THEME_WIN_QUIRKS_CSS,
 918      ui::SCALE_FACTOR_NONE},
 919     {"svg.css", IDR_UASTYLE_SVG_CSS, ui::SCALE_FACTOR_NONE},
 920     {"navigationTransitions.css",
 921      IDR_UASTYLE_NAVIGATION_TRANSITIONS_CSS,
 922      ui::SCALE_FACTOR_NONE},
 923     {"mathml.css", IDR_UASTYLE_MATHML_CSS, ui::SCALE_FACTOR_NONE},
 924     {"mediaControls.css",
 925      IDR_UASTYLE_MEDIA_CONTROLS_CSS,
 926      ui::SCALE_FACTOR_NONE},
 927     {"fullscreen.css", IDR_UASTYLE_FULLSCREEN_CSS, ui::SCALE_FACTOR_NONE},
 928     {"xhtmlmp.css", IDR_UASTYLE_XHTMLMP_CSS, ui::SCALE_FACTOR_NONE},
 929     {"viewportAndroid.css",
 930      IDR_UASTYLE_VIEWPORT_ANDROID_CSS,
 931      ui::SCALE_FACTOR_NONE},
 932     {"InspectorOverlayPage.html",
 933      IDR_INSPECTOR_OVERLAY_PAGE_HTML,
 934      ui::SCALE_FACTOR_NONE},
 935     {"InjectedScriptSource.js",
 936      IDR_INSPECTOR_INJECTED_SCRIPT_SOURCE_JS,
 937      ui::SCALE_FACTOR_NONE},
 938     {"DebuggerScriptSource.js",
 939      IDR_INSPECTOR_DEBUGGER_SCRIPT_SOURCE_JS,
 940      ui::SCALE_FACTOR_NONE},
 941     {"DocumentExecCommand.js",
 942      IDR_PRIVATE_SCRIPT_DOCUMENTEXECCOMMAND_JS,
 943      ui::SCALE_FACTOR_NONE},
 944     {"DocumentXMLTreeViewer.css",
 945      IDR_PRIVATE_SCRIPT_DOCUMENTXMLTREEVIEWER_CSS,
 946      ui::SCALE_FACTOR_NONE},
 947     {"DocumentXMLTreeViewer.js",
 948      IDR_PRIVATE_SCRIPT_DOCUMENTXMLTREEVIEWER_JS,
 949      ui::SCALE_FACTOR_NONE},
 950     {"HTMLMarqueeElement.js",
 951      IDR_PRIVATE_SCRIPT_HTMLMARQUEEELEMENT_JS,
 952      ui::SCALE_FACTOR_NONE},
 953     {"PluginPlaceholderElement.js",
 954      IDR_PRIVATE_SCRIPT_PLUGINPLACEHOLDERELEMENT_JS,
 955      ui::SCALE_FACTOR_NONE},
 956     {"PrivateScriptRunner.js",
 957      IDR_PRIVATE_SCRIPT_PRIVATESCRIPTRUNNER_JS,
 958      ui::SCALE_FACTOR_NONE},
 959 #ifdef IDR_PICKER_COMMON_JS
 960     {"pickerCommon.js", IDR_PICKER_COMMON_JS, ui::SCALE_FACTOR_NONE},
 961     {"pickerCommon.css", IDR_PICKER_COMMON_CSS, ui::SCALE_FACTOR_NONE},
 962     {"calendarPicker.js", IDR_CALENDAR_PICKER_JS, ui::SCALE_FACTOR_NONE},
 963     {"calendarPicker.css", IDR_CALENDAR_PICKER_CSS, ui::SCALE_FACTOR_NONE},
 964     {"listPicker.js", IDR_LIST_PICKER_JS, ui::SCALE_FACTOR_NONE},
 965     {"listPicker.css", IDR_LIST_PICKER_CSS, ui::SCALE_FACTOR_NONE},
 966     {"pickerButton.css", IDR_PICKER_BUTTON_CSS, ui::SCALE_FACTOR_NONE},
 967     {"suggestionPicker.js", IDR_SUGGESTION_PICKER_JS, ui::SCALE_FACTOR_NONE},
 968     {"suggestionPicker.css", IDR_SUGGESTION_PICKER_CSS, ui::SCALE_FACTOR_NONE},
 969     {"colorSuggestionPicker.js",
 970      IDR_COLOR_SUGGESTION_PICKER_JS,
 971      ui::SCALE_FACTOR_NONE},
 972     {"colorSuggestionPicker.css",
 973      IDR_COLOR_SUGGESTION_PICKER_CSS,
 974      ui::SCALE_FACTOR_NONE},
 975 #endif
 976 };
 977
 978 }  // namespace
 979
 980 WebData BlinkPlatformImpl::loadResource(const char* name) {
 981   // Some clients will call into this method with an empty |name| when they have
 982   // optional resources.  For example, the PopupMenuChromium code can have icons
 983   // for some Autofill items but not for others.
 984   if (!strlen(name))
 985     return WebData();
 986
 987   // Check the name prefix to see if it's an audio resource.
 988   if (StartsWithASCII(name, "IRC_Composite", true) ||
 989       StartsWithASCII(name, "Composite", true))
 990     return loadAudioSpatializationResource(name);
 991
 992   // TODO(flackr): We should use a better than linear search here, a trie would
 993   // be ideal.
 994   for (size_t i = 0; i < arraysize(kDataResources); ++i) {
 995     if (!strcmp(name, kDataResources[i].name)) {
 996       base::StringPiece resource = GetContentClient()->GetDataResource(
 997           kDataResources[i].id, kDataResources[i].scale_factor);
 998       return WebData(resource.data(), resource.size());
 999     }
1000   }
1001
1002   NOTREACHED() << "Unknown image resource " << name;
1003   return WebData();
1004 }
1005
1006 WebString BlinkPlatformImpl::queryLocalizedString(
1007     WebLocalizedString::Name name) {
1008   int message_id = ToMessageID(name);
1009   if (message_id < 0)
1010     return WebString();
1011   return GetContentClient()->GetLocalizedString(message_id);
1012 }
1013
1014 WebString BlinkPlatformImpl::queryLocalizedString(
1015     WebLocalizedString::Name name, int numeric_value) {
1016   return queryLocalizedString(name, base::IntToString16(numeric_value));
1017 }
1018
1019 WebString BlinkPlatformImpl::queryLocalizedString(
1020     WebLocalizedString::Name name, const WebString& value) {
1021   int message_id = ToMessageID(name);
1022   if (message_id < 0)
1023     return WebString();
1024   return ReplaceStringPlaceholders(GetContentClient()->GetLocalizedString(
1025       message_id), value, NULL);
1026 }
1027
1028 WebString BlinkPlatformImpl::queryLocalizedString(
1029     WebLocalizedString::Name name,
1030     const WebString& value1,
1031     const WebString& value2) {
1032   int message_id = ToMessageID(name);
1033   if (message_id < 0)
1034     return WebString();
1035   std::vector<base::string16> values;
1036   values.reserve(2);
1037   values.push_back(value1);
1038   values.push_back(value2);
1039   return ReplaceStringPlaceholders(
1040       GetContentClient()->GetLocalizedString(message_id), values, NULL);
1041 }
1042
1043 double BlinkPlatformImpl::currentTime() {
1044   return base::Time::Now().ToDoubleT();
1045 }
1046
1047 double BlinkPlatformImpl::monotonicallyIncreasingTime() {
1048   return base::TimeTicks::Now().ToInternalValue() /
1049       static_cast<double>(base::Time::kMicrosecondsPerSecond);
1050 }
1051
1052 void BlinkPlatformImpl::cryptographicallyRandomValues(
1053     unsigned char* buffer, size_t length) {
1054   base::RandBytes(buffer, length);
1055 }
1056
1057 void BlinkPlatformImpl::setSharedTimerFiredFunction(void (*func)()) {
1058   shared_timer_func_ = func;
1059 }
1060
1061 void BlinkPlatformImpl::setSharedTimerFireInterval(
1062     double interval_seconds) {
1063   shared_timer_fire_time_ = interval_seconds + monotonicallyIncreasingTime();
1064   if (shared_timer_suspended_) {
1065     shared_timer_fire_time_was_set_while_suspended_ = true;
1066     return;
1067   }
1068
1069   // By converting between double and int64 representation, we run the risk
1070   // of losing precision due to rounding errors. Performing computations in
1071   // microseconds reduces this risk somewhat. But there still is the potential
1072   // of us computing a fire time for the timer that is shorter than what we
1073   // need.
1074   // As the event loop will check event deadlines prior to actually firing
1075   // them, there is a risk of needlessly rescheduling events and of
1076   // needlessly looping if sleep times are too short even by small amounts.
1077   // This results in measurable performance degradation unless we use ceil() to
1078   // always round up the sleep times.
1079   int64 interval = static_cast<int64>(
1080       ceil(interval_seconds * base::Time::kMillisecondsPerSecond)
1081       * base::Time::kMicrosecondsPerMillisecond);
1082
1083   if (interval < 0)
1084     interval = 0;
1085
1086   shared_timer_.Stop();
1087   shared_timer_.Start(FROM_HERE, base::TimeDelta::FromMicroseconds(interval),
1088                       this, &BlinkPlatformImpl::DoTimeout);
1089   OnStartSharedTimer(base::TimeDelta::FromMicroseconds(interval));
1090 }
1091
1092 void BlinkPlatformImpl::stopSharedTimer() {
1093   shared_timer_.Stop();
1094 }
1095
1096 void BlinkPlatformImpl::callOnMainThread(
1097     void (*func)(void*), void* context) {
1098   main_thread_task_runner_->PostTask(FROM_HERE, base::Bind(func, context));
1099 }
1100
1101 blink::WebGestureCurve* BlinkPlatformImpl::createFlingAnimationCurve(
1102     blink::WebGestureDevice device_source,
1103     const blink::WebFloatPoint& velocity,
1104     const blink::WebSize& cumulative_scroll) {
1105   return ui::WebGestureCurveImpl::CreateFromDefaultPlatformCurve(
1106              gfx::Vector2dF(velocity.x, velocity.y),
1107              gfx::Vector2dF(cumulative_scroll.width, cumulative_scroll.height),
1108              IsMainThread()).release();
1109 }
1110
1111 void BlinkPlatformImpl::didStartWorkerRunLoop() {
1112   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
1113   worker_task_runner->OnWorkerRunLoopStarted();
1114 }
1115
1116 void BlinkPlatformImpl::didStopWorkerRunLoop() {
1117   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
1118   worker_task_runner->OnWorkerRunLoopStopped();
1119 }
1120
1121 blink::WebCrypto* BlinkPlatformImpl::crypto() {
1122   return &web_crypto_;
1123 }
1124
1125 blink::WebGeofencingProvider* BlinkPlatformImpl::geofencingProvider() {
1126   return geofencing_provider_.get();
1127 }
1128
1129 blink::WebBluetooth* BlinkPlatformImpl::bluetooth() {
1130   return bluetooth_.get();
1131 }
1132
1133 blink::WebNotificationManager*
1134 BlinkPlatformImpl::notificationManager() {
1135   if (!thread_safe_sender_.get() || !notification_dispatcher_.get())
1136     return nullptr;
1137
1138   return NotificationManager::ThreadSpecificInstance(
1139       thread_safe_sender_.get(),
1140       main_thread_task_runner_.get(),
1141       notification_dispatcher_.get());
1142 }
1143
1144 blink::WebPushProvider* BlinkPlatformImpl::pushProvider() {
1145   if (!thread_safe_sender_.get() || !push_dispatcher_.get())
1146     return nullptr;
1147
1148   return PushProvider::ThreadSpecificInstance(thread_safe_sender_.get(),
1149                                               push_dispatcher_.get());
1150 }
1151
1152 blink::WebNavigatorConnectProvider*
1153 BlinkPlatformImpl::navigatorConnectProvider() {
1154   if (!thread_safe_sender_.get())
1155     return nullptr;
1156
1157   return NavigatorConnectProvider::ThreadSpecificInstance(
1158       thread_safe_sender_.get(), main_thread_task_runner_);
1159 }
1160
1161 blink::WebPermissionClient* BlinkPlatformImpl::permissionClient() {
1162   if (!permission_client_.get())
1163     return nullptr;
1164
1165   if (IsMainThread())
1166     return permission_client_.get();
1167
1168   return PermissionDispatcherThreadProxy::GetThreadInstance(
1169       main_thread_task_runner_.get(), permission_client_.get());
1170 }
1171
1172 WebThemeEngine* BlinkPlatformImpl::themeEngine() {
1173   return &native_theme_engine_;
1174 }
1175
1176 WebFallbackThemeEngine* BlinkPlatformImpl::fallbackThemeEngine() {
1177   return &fallback_theme_engine_;
1178 }
1179
1180 blink::Platform::FileHandle BlinkPlatformImpl::databaseOpenFile(
1181     const blink::WebString& vfs_file_name, int desired_flags) {
1182 #if defined(OS_WIN)
1183   return INVALID_HANDLE_VALUE;
1184 #elif defined(OS_POSIX)
1185   return -1;
1186 #endif
1187 }
1188
1189 int BlinkPlatformImpl::databaseDeleteFile(
1190     const blink::WebString& vfs_file_name, bool sync_dir) {
1191   return -1;
1192 }
1193
1194 long BlinkPlatformImpl::databaseGetFileAttributes(
1195     const blink::WebString& vfs_file_name) {
1196   return 0;
1197 }
1198
1199 long long BlinkPlatformImpl::databaseGetFileSize(
1200     const blink::WebString& vfs_file_name) {
1201   return 0;
1202 }
1203
1204 long long BlinkPlatformImpl::databaseGetSpaceAvailableForOrigin(
1205     const blink::WebString& origin_identifier) {
1206   return 0;
1207 }
1208
1209 bool BlinkPlatformImpl::databaseSetFileSize(
1210     const blink::WebString& vfs_file_name, long long size) {
1211   return false;
1212 }
1213
1214 blink::WebString BlinkPlatformImpl::signedPublicKeyAndChallengeString(
1215     unsigned key_size_index,
1216     const blink::WebString& challenge,
1217     const blink::WebURL& url) {
1218   return blink::WebString("");
1219 }
1220
1221 static scoped_ptr<base::ProcessMetrics> CurrentProcessMetrics() {
1222   using base::ProcessMetrics;
1223 #if defined(OS_MACOSX)
1224   return scoped_ptr<ProcessMetrics>(
1225       // The default port provider is sufficient to get data for the current
1226       // process.
1227       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
1228                                            NULL));
1229 #else
1230   return scoped_ptr<ProcessMetrics>(
1231       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle()));
1232 #endif
1233 }
1234
1235 static size_t getMemoryUsageMB(bool bypass_cache) {
1236   size_t current_mem_usage = 0;
1237   MemoryUsageCache* mem_usage_cache_singleton = MemoryUsageCache::GetInstance();
1238   if (!bypass_cache &&
1239       mem_usage_cache_singleton->IsCachedValueValid(&current_mem_usage))
1240     return current_mem_usage;
1241
1242   current_mem_usage = GetMemoryUsageKB() >> 10;
1243   mem_usage_cache_singleton->SetMemoryValue(current_mem_usage);
1244   return current_mem_usage;
1245 }
1246
1247 size_t BlinkPlatformImpl::memoryUsageMB() {
1248   return getMemoryUsageMB(false);
1249 }
1250
1251 size_t BlinkPlatformImpl::actualMemoryUsageMB() {
1252   return getMemoryUsageMB(true);
1253 }
1254
1255 size_t BlinkPlatformImpl::physicalMemoryMB() {
1256   return static_cast<size_t>(base::SysInfo::AmountOfPhysicalMemoryMB());
1257 }
1258
1259 size_t BlinkPlatformImpl::virtualMemoryLimitMB() {
1260   return static_cast<size_t>(base::SysInfo::AmountOfVirtualMemoryMB());
1261 }
1262
1263 size_t BlinkPlatformImpl::numberOfProcessors() {
1264   return static_cast<size_t>(base::SysInfo::NumberOfProcessors());
1265 }
1266
1267 bool BlinkPlatformImpl::processMemorySizesInBytes(
1268     size_t* private_bytes,
1269     size_t* shared_bytes) {
1270   return CurrentProcessMetrics()->GetMemoryBytes(private_bytes, shared_bytes);
1271 }
1272
1273 bool BlinkPlatformImpl::memoryAllocatorWasteInBytes(size_t* size) {
1274   return base::allocator::GetAllocatorWasteSize(size);
1275 }
1276
1277 blink::WebDiscardableMemory*
1278 BlinkPlatformImpl::allocateAndLockDiscardableMemory(size_t bytes) {
1279   return content::WebDiscardableMemoryImpl::CreateLockedMemory(bytes).release();
1280 }
1281
1282 size_t BlinkPlatformImpl::maxDecodedImageBytes() {
1283 #if defined(OS_ANDROID)
1284   if (base::SysInfo::IsLowEndDevice()) {
1285     // Limit image decoded size to 3M pixels on low end devices.
1286     // 4 is maximum number of bytes per pixel.
1287     return 3 * 1024 * 1024 * 4;
1288   }
1289   // For other devices, limit decoded image size based on the amount of physical
1290   // memory.
1291   // In some cases all physical memory is not accessible by Chromium, as it can
1292   // be reserved for direct use by certain hardware. Thus, we set the limit so
1293   // that 1.6GB of reported physical memory on a 2GB device is enough to set the
1294   // limit at 16M pixels, which is a desirable value since 4K*4K is a relatively
1295   // common texture size.
1296   return base::SysInfo::AmountOfPhysicalMemory() / 25;
1297 #else
1298   return noDecodedImageByteLimit;
1299 #endif
1300 }
1301
1302 void BlinkPlatformImpl::SuspendSharedTimer() {
1303   ++shared_timer_suspended_;
1304 }
1305
1306 void BlinkPlatformImpl::ResumeSharedTimer() {
1307   DCHECK_GT(shared_timer_suspended_, 0);
1308
1309   // The shared timer may have fired or been adjusted while we were suspended.
1310   if (--shared_timer_suspended_ == 0 &&
1311       (!shared_timer_.IsRunning() ||
1312        shared_timer_fire_time_was_set_while_suspended_)) {
1313     shared_timer_fire_time_was_set_while_suspended_ = false;
1314     setSharedTimerFireInterval(
1315         shared_timer_fire_time_ - monotonicallyIncreasingTime());
1316   }
1317 }
1318
1319 scoped_refptr<base::SingleThreadTaskRunner>
1320 BlinkPlatformImpl::MainTaskRunnerForCurrentThread() {
1321   if (main_thread_task_runner_.get() &&
1322       main_thread_task_runner_->BelongsToCurrentThread()) {
1323     return main_thread_task_runner_;
1324   } else {
1325     return base::MessageLoopProxy::current();
1326   }
1327 }
1328
1329 bool BlinkPlatformImpl::IsMainThread() const {
1330   return main_thread_task_runner_.get() &&
1331          main_thread_task_runner_->BelongsToCurrentThread();
1332 }
1333
1334 WebString BlinkPlatformImpl::domCodeStringFromEnum(int dom_code) {
1335   return WebString::fromUTF8(ui::KeycodeConverter::DomCodeToCodeString(
1336       static_cast<ui::DomCode>(dom_code)));
1337 }
1338
1339 int BlinkPlatformImpl::domEnumFromCodeString(const WebString& code) {
1340   return static_cast<int>(ui::KeycodeConverter::CodeStringToDomCode(
1341       code.utf8().data()));
1342 }
1343
1344 }  // namespace content