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