content/child/blink_platform_impl.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/child/blink_platform_impl.h"
   6
   7 #include <math.h>
   8
   9 #include <vector>
  10
  11 #include "base/allocator/allocator_extension.h"
  12 #include "base/bind.h"
  13 #include "base/files/file_path.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/memory/singleton.h"
  16 #include "base/message_loop/message_loop.h"
  17 #include "base/metrics/histogram.h"
  18 #include "base/metrics/sparse_histogram.h"
  19 #include "base/metrics/stats_counters.h"
  20 #include "base/process/process_metrics.h"
  21 #include "base/rand_util.h"
  22 #include "base/strings/string_number_conversions.h"
  23 #include "base/strings/string_util.h"
  24 #include "base/strings/utf_string_conversions.h"
  25 #include "base/synchronization/lock.h"
  26 #include "base/synchronization/waitable_event.h"
  27 #include "base/sys_info.h"
  28 #include "base/threading/platform_thread.h"
  29 #include "base/time/time.h"
  30 #include "blink/public/resources/grit/blink_resources.h"
  31 #include "content/app/resources/grit/content_resources.h"
  32 #include "content/app/strings/grit/content_strings.h"
  33 #include "content/child/child_thread.h"
  34 #include "content/child/content_child_helpers.h"
  35 #include "content/child/geofencing/web_geofencing_provider_impl.h"
  36 #include "content/child/notifications/notification_dispatcher.h"
  37 #include "content/child/notifications/notification_manager.h"
  38 #include "content/child/thread_safe_sender.h"
  39 #include "content/child/web_discardable_memory_impl.h"
  40 #include "content/child/web_gesture_curve_impl.h"
  41 #include "content/child/web_url_loader_impl.h"
  42 #include "content/child/websocket_bridge.h"
  43 #include "content/child/webthread_impl.h"
  44 #include "content/child/worker_task_runner.h"
  45 #include "content/public/common/content_client.h"
  46 #include "net/base/data_url.h"
  47 #include "net/base/mime_util.h"
  48 #include "net/base/net_errors.h"
  49 #include "net/base/net_util.h"
  50 #include "third_party/WebKit/public/platform/WebConvertableToTraceFormat.h"
  51 #include "third_party/WebKit/public/platform/WebData.h"
  52 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
  53 #include "third_party/WebKit/public/platform/WebString.h"
  54 #include "third_party/WebKit/public/platform/WebURL.h"
  55 #include "third_party/WebKit/public/platform/WebWaitableEvent.h"
  56 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  57 #include "ui/base/layout.h"
  58
  59 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
  60 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
  61 #endif
  62
  63 using blink::WebData;
  64 using blink::WebFallbackThemeEngine;
  65 using blink::WebLocalizedString;
  66 using blink::WebString;
  67 using blink::WebThemeEngine;
  68 using blink::WebURL;
  69 using blink::WebURLError;
  70 using blink::WebURLLoader;
  71
  72 namespace content {
  73
  74 namespace {
  75
  76 class WebWaitableEventImpl : public blink::WebWaitableEvent {
  77  public:
  78   WebWaitableEventImpl() : impl_(new base::WaitableEvent(false, false)) {}
  79   virtual ~WebWaitableEventImpl() {}
  80
  81   virtual void wait() { impl_->Wait(); }
  82   virtual void signal() { impl_->Signal(); }
  83
  84   base::WaitableEvent* impl() {
  85     return impl_.get();
  86   }
  87
  88  private:
  89   scoped_ptr<base::WaitableEvent> impl_;
  90   DISALLOW_COPY_AND_ASSIGN(WebWaitableEventImpl);
  91 };
  92
  93 // A simple class to cache the memory usage for a given amount of time.
  94 class MemoryUsageCache {
  95  public:
  96   // Retrieves the Singleton.
  97   static MemoryUsageCache* GetInstance() {
  98     return Singleton<MemoryUsageCache>::get();
  99   }
 100
 101   MemoryUsageCache() : memory_value_(0) { Init(); }
 102   ~MemoryUsageCache() {}
 103
 104   void Init() {
 105     const unsigned int kCacheSeconds = 1;
 106     cache_valid_time_ = base::TimeDelta::FromSeconds(kCacheSeconds);
 107   }
 108
 109   // Returns true if the cached value is fresh.
 110   // Returns false if the cached value is stale, or if |cached_value| is NULL.
 111   bool IsCachedValueValid(size_t* cached_value) {
 112     base::AutoLock scoped_lock(lock_);
 113     if (!cached_value)
 114       return false;
 115     if (base::Time::Now() - last_updated_time_ > cache_valid_time_)
 116       return false;
 117     *cached_value = memory_value_;
 118     return true;
 119   };
 120
 121   // Setter for |memory_value_|, refreshes |last_updated_time_|.
 122   void SetMemoryValue(const size_t value) {
 123     base::AutoLock scoped_lock(lock_);
 124     memory_value_ = value;
 125     last_updated_time_ = base::Time::Now();
 126   }
 127
 128  private:
 129   // The cached memory value.
 130   size_t memory_value_;
 131
 132   // How long the cached value should remain valid.
 133   base::TimeDelta cache_valid_time_;
 134
 135   // The last time the cached value was updated.
 136   base::Time last_updated_time_;
 137
 138   base::Lock lock_;
 139 };
 140
 141 class ConvertableToTraceFormatWrapper
 142     : public base::debug::ConvertableToTraceFormat {
 143  public:
 144   explicit ConvertableToTraceFormatWrapper(
 145       const blink::WebConvertableToTraceFormat& convertable)
 146       : convertable_(convertable) {}
 147   void AppendAsTraceFormat(std::string* out) const override {
 148     *out += convertable_.asTraceFormat().utf8();
 149   }
 150
 151  private:
 152   ~ConvertableToTraceFormatWrapper() override {}
 153
 154   blink::WebConvertableToTraceFormat convertable_;
 155 };
 156
 157 bool isHostnameReservedIPAddress(const std::string& host) {
 158   net::IPAddressNumber address;
 159   if (!net::ParseURLHostnameToNumber(host, &address))
 160     return false;
 161   return net::IsIPAddressReserved(address);
 162 }
 163
 164 }  // namespace
 165
 166 static int ToMessageID(WebLocalizedString::Name name) {
 167   switch (name) {
 168     case WebLocalizedString::AXAMPMFieldText:
 169       return IDS_AX_AM_PM_FIELD_TEXT;
 170     case WebLocalizedString::AXButtonActionVerb:
 171       return IDS_AX_BUTTON_ACTION_VERB;
 172     case WebLocalizedString::AXCalendarShowMonthSelector:
 173       return IDS_AX_CALENDAR_SHOW_MONTH_SELECTOR;
 174     case WebLocalizedString::AXCalendarShowNextMonth:
 175       return IDS_AX_CALENDAR_SHOW_NEXT_MONTH;
 176     case WebLocalizedString::AXCalendarShowPreviousMonth:
 177       return IDS_AX_CALENDAR_SHOW_PREVIOUS_MONTH;
 178     case WebLocalizedString::AXCalendarWeekDescription:
 179       return IDS_AX_CALENDAR_WEEK_DESCRIPTION;
 180     case WebLocalizedString::AXCheckedCheckBoxActionVerb:
 181       return IDS_AX_CHECKED_CHECK_BOX_ACTION_VERB;
 182     case WebLocalizedString::AXDateTimeFieldEmptyValueText:
 183       return IDS_AX_DATE_TIME_FIELD_EMPTY_VALUE_TEXT;
 184     case WebLocalizedString::AXDayOfMonthFieldText:
 185       return IDS_AX_DAY_OF_MONTH_FIELD_TEXT;
 186     case WebLocalizedString::AXHeadingText:
 187       return IDS_AX_ROLE_HEADING;
 188     case WebLocalizedString::AXHourFieldText:
 189       return IDS_AX_HOUR_FIELD_TEXT;
 190     case WebLocalizedString::AXImageMapText:
 191       return IDS_AX_ROLE_IMAGE_MAP;
 192     case WebLocalizedString::AXLinkActionVerb:
 193       return IDS_AX_LINK_ACTION_VERB;
 194     case WebLocalizedString::AXLinkText:
 195       return IDS_AX_ROLE_LINK;
 196     case WebLocalizedString::AXListMarkerText:
 197       return IDS_AX_ROLE_LIST_MARKER;
 198     case WebLocalizedString::AXMediaDefault:
 199       return IDS_AX_MEDIA_DEFAULT;
 200     case WebLocalizedString::AXMediaAudioElement:
 201       return IDS_AX_MEDIA_AUDIO_ELEMENT;
 202     case WebLocalizedString::AXMediaVideoElement:
 203       return IDS_AX_MEDIA_VIDEO_ELEMENT;
 204     case WebLocalizedString::AXMediaMuteButton:
 205       return IDS_AX_MEDIA_MUTE_BUTTON;
 206     case WebLocalizedString::AXMediaUnMuteButton:
 207       return IDS_AX_MEDIA_UNMUTE_BUTTON;
 208     case WebLocalizedString::AXMediaPlayButton:
 209       return IDS_AX_MEDIA_PLAY_BUTTON;
 210     case WebLocalizedString::AXMediaPauseButton:
 211       return IDS_AX_MEDIA_PAUSE_BUTTON;
 212     case WebLocalizedString::AXMediaSlider:
 213       return IDS_AX_MEDIA_SLIDER;
 214     case WebLocalizedString::AXMediaSliderThumb:
 215       return IDS_AX_MEDIA_SLIDER_THUMB;
 216     case WebLocalizedString::AXMediaCurrentTimeDisplay:
 217       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY;
 218     case WebLocalizedString::AXMediaTimeRemainingDisplay:
 219       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY;
 220     case WebLocalizedString::AXMediaStatusDisplay:
 221       return IDS_AX_MEDIA_STATUS_DISPLAY;
 222     case WebLocalizedString::AXMediaEnterFullscreenButton:
 223       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON;
 224     case WebLocalizedString::AXMediaExitFullscreenButton:
 225       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON;
 226     case WebLocalizedString::AXMediaShowClosedCaptionsButton:
 227       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON;
 228     case WebLocalizedString::AXMediaHideClosedCaptionsButton:
 229       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON;
 230     case WebLocalizedString::AxMediaCastOffButton:
 231       return IDS_AX_MEDIA_CAST_OFF_BUTTON;
 232     case WebLocalizedString::AxMediaCastOnButton:
 233       return IDS_AX_MEDIA_CAST_ON_BUTTON;
 234     case WebLocalizedString::AXMediaAudioElementHelp:
 235       return IDS_AX_MEDIA_AUDIO_ELEMENT_HELP;
 236     case WebLocalizedString::AXMediaVideoElementHelp:
 237       return IDS_AX_MEDIA_VIDEO_ELEMENT_HELP;
 238     case WebLocalizedString::AXMediaMuteButtonHelp:
 239       return IDS_AX_MEDIA_MUTE_BUTTON_HELP;
 240     case WebLocalizedString::AXMediaUnMuteButtonHelp:
 241       return IDS_AX_MEDIA_UNMUTE_BUTTON_HELP;
 242     case WebLocalizedString::AXMediaPlayButtonHelp:
 243       return IDS_AX_MEDIA_PLAY_BUTTON_HELP;
 244     case WebLocalizedString::AXMediaPauseButtonHelp:
 245       return IDS_AX_MEDIA_PAUSE_BUTTON_HELP;
 246     case WebLocalizedString::AXMediaSliderHelp:
 247       return IDS_AX_MEDIA_SLIDER_HELP;
 248     case WebLocalizedString::AXMediaSliderThumbHelp:
 249       return IDS_AX_MEDIA_SLIDER_THUMB_HELP;
 250     case WebLocalizedString::AXMediaCurrentTimeDisplayHelp:
 251       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY_HELP;
 252     case WebLocalizedString::AXMediaTimeRemainingDisplayHelp:
 253       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY_HELP;
 254     case WebLocalizedString::AXMediaStatusDisplayHelp:
 255       return IDS_AX_MEDIA_STATUS_DISPLAY_HELP;
 256     case WebLocalizedString::AXMediaEnterFullscreenButtonHelp:
 257       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON_HELP;
 258     case WebLocalizedString::AXMediaExitFullscreenButtonHelp:
 259       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON_HELP;
 260     case WebLocalizedString::AXMediaShowClosedCaptionsButtonHelp:
 261       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON_HELP;
 262     case WebLocalizedString::AXMediaHideClosedCaptionsButtonHelp:
 263       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON_HELP;
 264     case WebLocalizedString::AxMediaCastOffButtonHelp:
 265       return IDS_AX_MEDIA_CAST_OFF_BUTTON_HELP;
 266     case WebLocalizedString::AxMediaCastOnButtonHelp:
 267       return IDS_AX_MEDIA_CAST_ON_BUTTON_HELP;
 268     case WebLocalizedString::AXMillisecondFieldText:
 269       return IDS_AX_MILLISECOND_FIELD_TEXT;
 270     case WebLocalizedString::AXMinuteFieldText:
 271       return IDS_AX_MINUTE_FIELD_TEXT;
 272     case WebLocalizedString::AXMonthFieldText:
 273       return IDS_AX_MONTH_FIELD_TEXT;
 274     case WebLocalizedString::AXRadioButtonActionVerb:
 275       return IDS_AX_RADIO_BUTTON_ACTION_VERB;
 276     case WebLocalizedString::AXSecondFieldText:
 277       return IDS_AX_SECOND_FIELD_TEXT;
 278     case WebLocalizedString::AXTextFieldActionVerb:
 279       return IDS_AX_TEXT_FIELD_ACTION_VERB;
 280     case WebLocalizedString::AXUncheckedCheckBoxActionVerb:
 281       return IDS_AX_UNCHECKED_CHECK_BOX_ACTION_VERB;
 282     case WebLocalizedString::AXWebAreaText:
 283       return IDS_AX_ROLE_WEB_AREA;
 284     case WebLocalizedString::AXWeekOfYearFieldText:
 285       return IDS_AX_WEEK_OF_YEAR_FIELD_TEXT;
 286     case WebLocalizedString::AXYearFieldText:
 287       return IDS_AX_YEAR_FIELD_TEXT;
 288     case WebLocalizedString::CalendarClear:
 289       return IDS_FORM_CALENDAR_CLEAR;
 290     case WebLocalizedString::CalendarToday:
 291       return IDS_FORM_CALENDAR_TODAY;
 292     case WebLocalizedString::DateFormatDayInMonthLabel:
 293       return IDS_FORM_DATE_FORMAT_DAY_IN_MONTH;
 294     case WebLocalizedString::DateFormatMonthLabel:
 295       return IDS_FORM_DATE_FORMAT_MONTH;
 296     case WebLocalizedString::DateFormatYearLabel:
 297       return IDS_FORM_DATE_FORMAT_YEAR;
 298     case WebLocalizedString::DetailsLabel:
 299       return IDS_DETAILS_WITHOUT_SUMMARY_LABEL;
 300     case WebLocalizedString::FileButtonChooseFileLabel:
 301       return IDS_FORM_FILE_BUTTON_LABEL;
 302     case WebLocalizedString::FileButtonChooseMultipleFilesLabel:
 303       return IDS_FORM_MULTIPLE_FILES_BUTTON_LABEL;
 304     case WebLocalizedString::FileButtonNoFileSelectedLabel:
 305       return IDS_FORM_FILE_NO_FILE_LABEL;
 306     case WebLocalizedString::InputElementAltText:
 307       return IDS_FORM_INPUT_ALT;
 308     case WebLocalizedString::KeygenMenuHighGradeKeySize:
 309       return IDS_KEYGEN_HIGH_GRADE_KEY;
 310     case WebLocalizedString::KeygenMenuMediumGradeKeySize:
 311       return IDS_KEYGEN_MED_GRADE_KEY;
 312     case WebLocalizedString::MissingPluginText:
 313       return IDS_PLUGIN_INITIALIZATION_ERROR;
 314     case WebLocalizedString::MultipleFileUploadText:
 315       return IDS_FORM_FILE_MULTIPLE_UPLOAD;
 316     case WebLocalizedString::OtherColorLabel:
 317       return IDS_FORM_OTHER_COLOR_LABEL;
 318     case WebLocalizedString::OtherDateLabel:
 319         return IDS_FORM_OTHER_DATE_LABEL;
 320     case WebLocalizedString::OtherMonthLabel:
 321       return IDS_FORM_OTHER_MONTH_LABEL;
 322     case WebLocalizedString::OtherTimeLabel:
 323       return IDS_FORM_OTHER_TIME_LABEL;
 324     case WebLocalizedString::OtherWeekLabel:
 325       return IDS_FORM_OTHER_WEEK_LABEL;
 326     case WebLocalizedString::PlaceholderForDayOfMonthField:
 327       return IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD;
 328     case WebLocalizedString::PlaceholderForMonthField:
 329       return IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD;
 330     case WebLocalizedString::PlaceholderForYearField:
 331       return IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD;
 332     case WebLocalizedString::ResetButtonDefaultLabel:
 333       return IDS_FORM_RESET_LABEL;
 334     case WebLocalizedString::SearchableIndexIntroduction:
 335       return IDS_SEARCHABLE_INDEX_INTRO;
 336     case WebLocalizedString::SearchMenuClearRecentSearchesText:
 337       return IDS_RECENT_SEARCHES_CLEAR;
 338     case WebLocalizedString::SearchMenuNoRecentSearchesText:
 339       return IDS_RECENT_SEARCHES_NONE;
 340     case WebLocalizedString::SearchMenuRecentSearchesText:
 341       return IDS_RECENT_SEARCHES;
 342     case WebLocalizedString::SelectMenuListText:
 343       return IDS_FORM_SELECT_MENU_LIST_TEXT;
 344     case WebLocalizedString::SubmitButtonDefaultLabel:
 345       return IDS_FORM_SUBMIT_LABEL;
 346     case WebLocalizedString::ThisMonthButtonLabel:
 347       return IDS_FORM_THIS_MONTH_LABEL;
 348     case WebLocalizedString::ThisWeekButtonLabel:
 349       return IDS_FORM_THIS_WEEK_LABEL;
 350     case WebLocalizedString::ValidationBadInputForDateTime:
 351       return IDS_FORM_VALIDATION_BAD_INPUT_DATETIME;
 352     case WebLocalizedString::ValidationBadInputForNumber:
 353       return IDS_FORM_VALIDATION_BAD_INPUT_NUMBER;
 354     case WebLocalizedString::ValidationPatternMismatch:
 355       return IDS_FORM_VALIDATION_PATTERN_MISMATCH;
 356     case WebLocalizedString::ValidationRangeOverflow:
 357       return IDS_FORM_VALIDATION_RANGE_OVERFLOW;
 358     case WebLocalizedString::ValidationRangeOverflowDateTime:
 359       return IDS_FORM_VALIDATION_RANGE_OVERFLOW_DATETIME;
 360     case WebLocalizedString::ValidationRangeUnderflow:
 361       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW;
 362     case WebLocalizedString::ValidationRangeUnderflowDateTime:
 363       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW_DATETIME;
 364     case WebLocalizedString::ValidationStepMismatch:
 365       return IDS_FORM_VALIDATION_STEP_MISMATCH;
 366     case WebLocalizedString::ValidationStepMismatchCloseToLimit:
 367       return IDS_FORM_VALIDATION_STEP_MISMATCH_CLOSE_TO_LIMIT;
 368     case WebLocalizedString::ValidationTooLong:
 369       return IDS_FORM_VALIDATION_TOO_LONG;
 370     case WebLocalizedString::ValidationTooShort:
 371       return IDS_FORM_VALIDATION_TOO_SHORT;
 372     case WebLocalizedString::ValidationTypeMismatch:
 373       return IDS_FORM_VALIDATION_TYPE_MISMATCH;
 374     case WebLocalizedString::ValidationTypeMismatchForEmail:
 375       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL;
 376     case WebLocalizedString::ValidationTypeMismatchForEmailEmpty:
 377       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY;
 378     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain:
 379       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_DOMAIN;
 380     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal:
 381       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_LOCAL;
 382     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain:
 383       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOMAIN;
 384     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots:
 385       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOTS;
 386     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal:
 387       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_LOCAL;
 388     case WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign:
 389       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_NO_AT_SIGN;
 390     case WebLocalizedString::ValidationTypeMismatchForMultipleEmail:
 391       return IDS_FORM_VALIDATION_TYPE_MISMATCH_MULTIPLE_EMAIL;
 392     case WebLocalizedString::ValidationTypeMismatchForURL:
 393       return IDS_FORM_VALIDATION_TYPE_MISMATCH_URL;
 394     case WebLocalizedString::ValidationValueMissing:
 395       return IDS_FORM_VALIDATION_VALUE_MISSING;
 396     case WebLocalizedString::ValidationValueMissingForCheckbox:
 397       return IDS_FORM_VALIDATION_VALUE_MISSING_CHECKBOX;
 398     case WebLocalizedString::ValidationValueMissingForFile:
 399       return IDS_FORM_VALIDATION_VALUE_MISSING_FILE;
 400     case WebLocalizedString::ValidationValueMissingForMultipleFile:
 401       return IDS_FORM_VALIDATION_VALUE_MISSING_MULTIPLE_FILE;
 402     case WebLocalizedString::ValidationValueMissingForRadio:
 403       return IDS_FORM_VALIDATION_VALUE_MISSING_RADIO;
 404     case WebLocalizedString::ValidationValueMissingForSelect:
 405       return IDS_FORM_VALIDATION_VALUE_MISSING_SELECT;
 406     case WebLocalizedString::WeekFormatTemplate:
 407       return IDS_FORM_INPUT_WEEK_TEMPLATE;
 408     case WebLocalizedString::WeekNumberLabel:
 409       return IDS_FORM_WEEK_NUMBER_LABEL;
 410     // This "default:" line exists to avoid compile warnings about enum
 411     // coverage when we add a new symbol to WebLocalizedString.h in WebKit.
 412     // After a planned WebKit patch is landed, we need to add a case statement
 413     // for the added symbol here.
 414     default:
 415       break;
 416   }
 417   return -1;
 418 }
 419
 420 BlinkPlatformImpl::BlinkPlatformImpl()
 421     : main_loop_(base::MessageLoop::current()),
 422       shared_timer_func_(NULL),
 423       shared_timer_fire_time_(0.0),
 424       shared_timer_fire_time_was_set_while_suspended_(false),
 425       shared_timer_suspended_(0),
 426       current_thread_slot_(&DestroyCurrentThread) {
 427   // ChildThread may not exist in some tests.
 428   if (ChildThread::current()) {
 429     geofencing_provider_.reset(new WebGeofencingProviderImpl(
 430         ChildThread::current()->thread_safe_sender()));
 431     thread_safe_sender_ = ChildThread::current()->thread_safe_sender();
 432     notification_dispatcher_ =
 433         ChildThread::current()->notification_dispatcher();
 434   }
 435 }
 436
 437 BlinkPlatformImpl::~BlinkPlatformImpl() {
 438 }
 439
 440 WebURLLoader* BlinkPlatformImpl::createURLLoader() {
 441   ChildThread* child_thread = ChildThread::current();
 442   // There may be no child thread in RenderViewTests.  These tests can still use
 443   // data URLs to bypass the ResourceDispatcher.
 444   return new WebURLLoaderImpl(
 445       child_thread ? child_thread->resource_dispatcher() : NULL);
 446 }
 447
 448 blink::WebSocketHandle* BlinkPlatformImpl::createWebSocketHandle() {
 449   return new WebSocketBridge;
 450 }
 451
 452 WebString BlinkPlatformImpl::userAgent() {
 453   return WebString::fromUTF8(GetContentClient()->GetUserAgent());
 454 }
 455
 456 WebData BlinkPlatformImpl::parseDataURL(const WebURL& url,
 457                                         WebString& mimetype_out,
 458                                         WebString& charset_out) {
 459   std::string mime_type, char_set, data;
 460   if (net::DataURL::Parse(url, &mime_type, &char_set, &data)
 461       && net::IsSupportedMimeType(mime_type)) {
 462     mimetype_out = WebString::fromUTF8(mime_type);
 463     charset_out = WebString::fromUTF8(char_set);
 464     return data;
 465   }
 466   return WebData();
 467 }
 468
 469 WebURLError BlinkPlatformImpl::cancelledError(
 470     const WebURL& unreachableURL) const {
 471   return WebURLLoaderImpl::CreateError(unreachableURL, false, net::ERR_ABORTED);
 472 }
 473
 474 bool BlinkPlatformImpl::isReservedIPAddress(
 475     const blink::WebSecurityOrigin& securityOrigin) const {
 476   return isHostnameReservedIPAddress(securityOrigin.host().utf8());
 477 }
 478
 479 bool BlinkPlatformImpl::isReservedIPAddress(const blink::WebURL& url) const {
 480   return isHostnameReservedIPAddress(GURL(url).host());
 481 }
 482
 483 blink::WebThread* BlinkPlatformImpl::createThread(const char* name) {
 484   return new WebThreadImpl(name);
 485 }
 486
 487 blink::WebThread* BlinkPlatformImpl::currentThread() {
 488   WebThreadImplForMessageLoop* thread =
 489       static_cast<WebThreadImplForMessageLoop*>(current_thread_slot_.Get());
 490   if (thread)
 491     return (thread);
 492
 493   scoped_refptr<base::MessageLoopProxy> message_loop =
 494       base::MessageLoopProxy::current();
 495   if (!message_loop.get())
 496     return NULL;
 497
 498   thread = new WebThreadImplForMessageLoop(message_loop.get());
 499   current_thread_slot_.Set(thread);
 500   return thread;
 501 }
 502
 503 void BlinkPlatformImpl::yieldCurrentThread() {
 504   base::PlatformThread::YieldCurrentThread();
 505 }
 506
 507 blink::WebWaitableEvent* BlinkPlatformImpl::createWaitableEvent() {
 508   return new WebWaitableEventImpl();
 509 }
 510
 511 blink::WebWaitableEvent* BlinkPlatformImpl::waitMultipleEvents(
 512     const blink::WebVector<blink::WebWaitableEvent*>& web_events) {
 513   std::vector<base::WaitableEvent*> events;
 514   for (size_t i = 0; i < web_events.size(); ++i)
 515     events.push_back(static_cast<WebWaitableEventImpl*>(web_events[i])->impl());
 516   size_t idx = base::WaitableEvent::WaitMany(
 517       vector_as_array(&events), events.size());
 518   DCHECK_LT(idx, web_events.size());
 519   return web_events[idx];
 520 }
 521
 522 void BlinkPlatformImpl::decrementStatsCounter(const char* name) {
 523   base::StatsCounter(name).Decrement();
 524 }
 525
 526 void BlinkPlatformImpl::incrementStatsCounter(const char* name) {
 527   base::StatsCounter(name).Increment();
 528 }
 529
 530 void BlinkPlatformImpl::histogramCustomCounts(
 531     const char* name, int sample, int min, int max, int bucket_count) {
 532   // Copied from histogram macro, but without the static variable caching
 533   // the histogram because name is dynamic.
 534   base::HistogramBase* counter =
 535       base::Histogram::FactoryGet(name, min, max, bucket_count,
 536           base::HistogramBase::kUmaTargetedHistogramFlag);
 537   DCHECK_EQ(name, counter->histogram_name());
 538   counter->Add(sample);
 539 }
 540
 541 void BlinkPlatformImpl::histogramEnumeration(
 542     const char* name, int sample, int boundary_value) {
 543   // Copied from histogram macro, but without the static variable caching
 544   // the histogram because name is dynamic.
 545   base::HistogramBase* counter =
 546       base::LinearHistogram::FactoryGet(name, 1, boundary_value,
 547           boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag);
 548   DCHECK_EQ(name, counter->histogram_name());
 549   counter->Add(sample);
 550 }
 551
 552 void BlinkPlatformImpl::histogramSparse(const char* name, int sample) {
 553   // For sparse histograms, we can use the macro, as it does not incorporate a
 554   // static.
 555   UMA_HISTOGRAM_SPARSE_SLOWLY(name, sample);
 556 }
 557
 558 const unsigned char* BlinkPlatformImpl::getTraceCategoryEnabledFlag(
 559     const char* category_group) {
 560   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 561 }
 562
 563 long* BlinkPlatformImpl::getTraceSamplingState(
 564     const unsigned thread_bucket) {
 565   switch (thread_bucket) {
 566     case 0:
 567       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(0));
 568     case 1:
 569       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(1));
 570     case 2:
 571       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(2));
 572     default:
 573       NOTREACHED() << "Unknown thread bucket type.";
 574   }
 575   return NULL;
 576 }
 577
 578 COMPILE_ASSERT(
 579     sizeof(blink::Platform::TraceEventHandle) ==
 580         sizeof(base::debug::TraceEventHandle),
 581     TraceEventHandle_types_must_be_same_size);
 582
 583 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 584     char phase,
 585     const unsigned char* category_group_enabled,
 586     const char* name,
 587     unsigned long long id,
 588     int num_args,
 589     const char** arg_names,
 590     const unsigned char* arg_types,
 591     const unsigned long long* arg_values,
 592     unsigned char flags) {
 593   base::debug::TraceEventHandle handle = TRACE_EVENT_API_ADD_TRACE_EVENT(
 594       phase, category_group_enabled, name, id,
 595       num_args, arg_names, arg_types, arg_values, NULL, flags);
 596   blink::Platform::TraceEventHandle result;
 597   memcpy(&result, &handle, sizeof(result));
 598   return result;
 599 }
 600
 601 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 602     char phase,
 603     const unsigned char* category_group_enabled,
 604     const char* name,
 605     unsigned long long id,
 606     int num_args,
 607     const char** arg_names,
 608     const unsigned char* arg_types,
 609     const unsigned long long* arg_values,
 610     const blink::WebConvertableToTraceFormat* convertable_values,
 611     unsigned char flags) {
 612   scoped_refptr<base::debug::ConvertableToTraceFormat> convertable_wrappers[2];
 613   if (convertable_values) {
 614     size_t size = std::min(static_cast<size_t>(num_args),
 615                            arraysize(convertable_wrappers));
 616     for (size_t i = 0; i < size; ++i) {
 617       if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) {
 618         convertable_wrappers[i] =
 619             new ConvertableToTraceFormatWrapper(convertable_values[i]);
 620       }
 621     }
 622   }
 623   base::debug::TraceEventHandle handle =
 624       TRACE_EVENT_API_ADD_TRACE_EVENT(phase,
 625                                       category_group_enabled,
 626                                       name,
 627                                       id,
 628                                       num_args,
 629                                       arg_names,
 630                                       arg_types,
 631                                       arg_values,
 632                                       convertable_wrappers,
 633                                       flags);
 634   blink::Platform::TraceEventHandle result;
 635   memcpy(&result, &handle, sizeof(result));
 636   return result;
 637 }
 638
 639 void BlinkPlatformImpl::updateTraceEventDuration(
 640     const unsigned char* category_group_enabled,
 641     const char* name,
 642     TraceEventHandle handle) {
 643   base::debug::TraceEventHandle traceEventHandle;
 644   memcpy(&traceEventHandle, &handle, sizeof(handle));
 645   TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
 646       category_group_enabled, name, traceEventHandle);
 647 }
 648
 649 namespace {
 650
 651 WebData loadAudioSpatializationResource(const char* name) {
 652 #ifdef IDR_AUDIO_SPATIALIZATION_COMPOSITE
 653   if (!strcmp(name, "Composite")) {
 654     base::StringPiece resource = GetContentClient()->GetDataResource(
 655         IDR_AUDIO_SPATIALIZATION_COMPOSITE, ui::SCALE_FACTOR_NONE);
 656     return WebData(resource.data(), resource.size());
 657   }
 658 #endif
 659
 660 #ifdef IDR_AUDIO_SPATIALIZATION_T000_P000
 661   const size_t kExpectedSpatializationNameLength = 31;
 662   if (strlen(name) != kExpectedSpatializationNameLength) {
 663     return WebData();
 664   }
 665
 666   // Extract the azimuth and elevation from the resource name.
 667   int azimuth = 0;
 668   int elevation = 0;
 669   int values_parsed =
 670       sscanf(name, "IRC_Composite_C_R0195_T%3d_P%3d", &azimuth, &elevation);
 671   if (values_parsed != 2) {
 672     return WebData();
 673   }
 674
 675   // The resource index values go through the elevations first, then azimuths.
 676   const int kAngleSpacing = 15;
 677
 678   // 0 <= elevation <= 90 (or 315 <= elevation <= 345)
 679   // in increments of 15 degrees.
 680   int elevation_index =
 681       elevation <= 90 ? elevation / kAngleSpacing :
 682       7 + (elevation - 315) / kAngleSpacing;
 683   bool is_elevation_index_good = 0 <= elevation_index && elevation_index < 10;
 684
 685   // 0 <= azimuth < 360 in increments of 15 degrees.
 686   int azimuth_index = azimuth / kAngleSpacing;
 687   bool is_azimuth_index_good = 0 <= azimuth_index && azimuth_index < 24;
 688
 689   const int kNumberOfElevations = 10;
 690   const int kNumberOfAudioResources = 240;
 691   int resource_index = kNumberOfElevations * azimuth_index + elevation_index;
 692   bool is_resource_index_good = 0 <= resource_index &&
 693       resource_index < kNumberOfAudioResources;
 694
 695   if (is_azimuth_index_good && is_elevation_index_good &&
 696       is_resource_index_good) {
 697     const int kFirstAudioResourceIndex = IDR_AUDIO_SPATIALIZATION_T000_P000;
 698     base::StringPiece resource = GetContentClient()->GetDataResource(
 699         kFirstAudioResourceIndex + resource_index, ui::SCALE_FACTOR_NONE);
 700     return WebData(resource.data(), resource.size());
 701   }
 702 #endif  // IDR_AUDIO_SPATIALIZATION_T000_P000
 703
 704   NOTREACHED();
 705   return WebData();
 706 }
 707
 708 struct DataResource {
 709   const char* name;
 710   int id;
 711   ui::ScaleFactor scale_factor;
 712 };
 713
 714 const DataResource kDataResources[] = {
 715   { "missingImage", IDR_BROKENIMAGE, ui::SCALE_FACTOR_100P },
 716   { "missingImage@2x", IDR_BROKENIMAGE, ui::SCALE_FACTOR_200P },
 717   { "mediaplayerPause", IDR_MEDIAPLAYER_PAUSE_BUTTON, ui::SCALE_FACTOR_100P },
 718   { "mediaplayerPauseHover",
 719     IDR_MEDIAPLAYER_PAUSE_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 720   { "mediaplayerPauseDown",
 721     IDR_MEDIAPLAYER_PAUSE_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 722   { "mediaplayerPlay", IDR_MEDIAPLAYER_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 723   { "mediaplayerPlayHover",
 724     IDR_MEDIAPLAYER_PLAY_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 725   { "mediaplayerPlayDown",
 726     IDR_MEDIAPLAYER_PLAY_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 727   { "mediaplayerPlayDisabled",
 728     IDR_MEDIAPLAYER_PLAY_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 729   { "mediaplayerSoundLevel3",
 730     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON, ui::SCALE_FACTOR_100P },
 731   { "mediaplayerSoundLevel3Hover",
 732     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 733   { "mediaplayerSoundLevel3Down",
 734     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 735   { "mediaplayerSoundLevel2",
 736     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON, ui::SCALE_FACTOR_100P },
 737   { "mediaplayerSoundLevel2Hover",
 738     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 739   { "mediaplayerSoundLevel2Down",
 740     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 741   { "mediaplayerSoundLevel1",
 742     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON, ui::SCALE_FACTOR_100P },
 743   { "mediaplayerSoundLevel1Hover",
 744     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 745   { "mediaplayerSoundLevel1Down",
 746     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 747   { "mediaplayerSoundLevel0",
 748     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON, ui::SCALE_FACTOR_100P },
 749   { "mediaplayerSoundLevel0Hover",
 750     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 751   { "mediaplayerSoundLevel0Down",
 752     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 753   { "mediaplayerSoundDisabled",
 754     IDR_MEDIAPLAYER_SOUND_DISABLED, ui::SCALE_FACTOR_100P },
 755   { "mediaplayerSliderThumb",
 756     IDR_MEDIAPLAYER_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 757   { "mediaplayerSliderThumbHover",
 758     IDR_MEDIAPLAYER_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 759   { "mediaplayerSliderThumbDown",
 760     IDR_MEDIAPLAYER_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 761   { "mediaplayerVolumeSliderThumb",
 762     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 763   { "mediaplayerVolumeSliderThumbHover",
 764     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 765   { "mediaplayerVolumeSliderThumbDown",
 766     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 767   { "mediaplayerVolumeSliderThumbDisabled",
 768     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DISABLED, ui::SCALE_FACTOR_100P },
 769   { "mediaplayerClosedCaption",
 770     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON, ui::SCALE_FACTOR_100P },
 771   { "mediaplayerClosedCaptionHover",
 772     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 773   { "mediaplayerClosedCaptionDown",
 774     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 775   { "mediaplayerClosedCaptionDisabled",
 776     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 777   { "mediaplayerFullscreen",
 778     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON, ui::SCALE_FACTOR_100P },
 779   { "mediaplayerFullscreenHover",
 780     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 781   { "mediaplayerFullscreenDown",
 782     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 783   { "mediaplayerCastOff",
 784     IDR_MEDIAPLAYER_CAST_BUTTON_OFF, ui::SCALE_FACTOR_100P },
 785   { "mediaplayerCastOn",
 786     IDR_MEDIAPLAYER_CAST_BUTTON_ON, ui::SCALE_FACTOR_100P },
 787   { "mediaplayerFullscreenDisabled",
 788     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 789   { "mediaplayerOverlayPlay",
 790     IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 791 #if defined(OS_MACOSX)
 792   { "overhangPattern", IDR_OVERHANG_PATTERN, ui::SCALE_FACTOR_100P },
 793   { "overhangShadow", IDR_OVERHANG_SHADOW, ui::SCALE_FACTOR_100P },
 794 #endif
 795   { "panIcon", IDR_PAN_SCROLL_ICON, ui::SCALE_FACTOR_100P },
 796   { "searchCancel", IDR_SEARCH_CANCEL, ui::SCALE_FACTOR_100P },
 797   { "searchCancelPressed", IDR_SEARCH_CANCEL_PRESSED, ui::SCALE_FACTOR_100P },
 798   { "searchMagnifier", IDR_SEARCH_MAGNIFIER, ui::SCALE_FACTOR_100P },
 799   { "searchMagnifierResults",
 800     IDR_SEARCH_MAGNIFIER_RESULTS, ui::SCALE_FACTOR_100P },
 801   { "textAreaResizeCorner", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_100P },
 802   { "textAreaResizeCorner@2x", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_200P },
 803   { "generatePassword", IDR_PASSWORD_GENERATION_ICON, ui::SCALE_FACTOR_100P },
 804   { "generatePasswordHover",
 805     IDR_PASSWORD_GENERATION_ICON_HOVER, ui::SCALE_FACTOR_100P },
 806   { "html.css", IDR_UASTYLE_HTML_CSS, ui::SCALE_FACTOR_NONE },
 807   { "quirks.css", IDR_UASTYLE_QUIRKS_CSS, ui::SCALE_FACTOR_NONE },
 808   { "view-source.css", IDR_UASTYLE_VIEW_SOURCE_CSS, ui::SCALE_FACTOR_NONE },
 809   { "themeChromium.css", IDR_UASTYLE_THEME_CHROMIUM_CSS,
 810     ui::SCALE_FACTOR_NONE },
 811 #if defined(OS_ANDROID)
 812   { "themeChromiumAndroid.css", IDR_UASTYLE_THEME_CHROMIUM_ANDROID_CSS,
 813     ui::SCALE_FACTOR_NONE },
 814   { "mediaControlsAndroid.css", IDR_UASTYLE_MEDIA_CONTROLS_ANDROID_CSS,
 815     ui::SCALE_FACTOR_NONE },
 816 #endif
 817 #if !defined(OS_WIN)
 818   { "themeChromiumLinux.css", IDR_UASTYLE_THEME_CHROMIUM_LINUX_CSS,
 819     ui::SCALE_FACTOR_NONE },
 820 #endif
 821   { "themeChromiumSkia.css", IDR_UASTYLE_THEME_CHROMIUM_SKIA_CSS,
 822     ui::SCALE_FACTOR_NONE },
 823   { "themeInputMultipleFields.css",
 824     IDR_UASTYLE_THEME_INPUT_MULTIPLE_FIELDS_CSS, ui::SCALE_FACTOR_NONE },
 825 #if defined(OS_MACOSX)
 826   { "themeMac.css", IDR_UASTYLE_THEME_MAC_CSS, ui::SCALE_FACTOR_NONE },
 827 #endif
 828   { "themeWin.css", IDR_UASTYLE_THEME_WIN_CSS, ui::SCALE_FACTOR_NONE },
 829   { "themeWinQuirks.css", IDR_UASTYLE_THEME_WIN_QUIRKS_CSS,
 830     ui::SCALE_FACTOR_NONE },
 831   { "svg.css", IDR_UASTYLE_SVG_CSS, ui::SCALE_FACTOR_NONE},
 832   { "navigationTransitions.css", IDR_UASTYLE_NAVIGATION_TRANSITIONS_CSS,
 833     ui::SCALE_FACTOR_NONE },
 834   { "mathml.css", IDR_UASTYLE_MATHML_CSS, ui::SCALE_FACTOR_NONE},
 835   { "mediaControls.css", IDR_UASTYLE_MEDIA_CONTROLS_CSS,
 836     ui::SCALE_FACTOR_NONE },
 837   { "fullscreen.css", IDR_UASTYLE_FULLSCREEN_CSS, ui::SCALE_FACTOR_NONE},
 838   { "xhtmlmp.css", IDR_UASTYLE_XHTMLMP_CSS, ui::SCALE_FACTOR_NONE},
 839   { "viewportAndroid.css", IDR_UASTYLE_VIEWPORT_ANDROID_CSS,
 840     ui::SCALE_FACTOR_NONE},
 841   { "InspectorOverlayPage.html", IDR_INSPECTOR_OVERLAY_PAGE_HTML,
 842     ui::SCALE_FACTOR_NONE },
 843   { "InjectedScriptCanvasModuleSource.js",
 844     IDR_INSPECTOR_INJECTED_SCRIPT_CANVAS_MODULE_SOURCE_JS,
 845     ui::SCALE_FACTOR_NONE },
 846   { "InjectedScriptSource.js", IDR_INSPECTOR_INJECTED_SCRIPT_SOURCE_JS,
 847     ui::SCALE_FACTOR_NONE },
 848   { "DebuggerScriptSource.js", IDR_INSPECTOR_DEBUGGER_SCRIPT_SOURCE_JS,
 849     ui::SCALE_FACTOR_NONE },
 850   { "DocumentExecCommand.js", IDR_PRIVATE_SCRIPT_DOCUMENTEXECCOMMAND_JS,
 851     ui::SCALE_FACTOR_NONE },
 852   { "DocumentXMLTreeViewer.js", IDR_PRIVATE_SCRIPT_DOCUMENTXMLTREEVIEWER_JS,
 853     ui::SCALE_FACTOR_NONE },
 854   { "HTMLMarqueeElement.js", IDR_PRIVATE_SCRIPT_HTMLMARQUEEELEMENT_JS,
 855     ui::SCALE_FACTOR_NONE },
 856   { "PluginPlaceholderElement.js",
 857     IDR_PRIVATE_SCRIPT_PLUGINPLACEHOLDERELEMENT_JS, ui::SCALE_FACTOR_NONE },
 858   { "PrivateScriptRunner.js", IDR_PRIVATE_SCRIPT_PRIVATESCRIPTRUNNER_JS,
 859     ui::SCALE_FACTOR_NONE },
 860 #ifdef IDR_PICKER_COMMON_JS
 861   { "pickerCommon.js", IDR_PICKER_COMMON_JS, ui::SCALE_FACTOR_NONE },
 862   { "pickerCommon.css", IDR_PICKER_COMMON_CSS, ui::SCALE_FACTOR_NONE },
 863   { "calendarPicker.js", IDR_CALENDAR_PICKER_JS, ui::SCALE_FACTOR_NONE },
 864   { "calendarPicker.css", IDR_CALENDAR_PICKER_CSS, ui::SCALE_FACTOR_NONE },
 865   { "pickerButton.css", IDR_PICKER_BUTTON_CSS, ui::SCALE_FACTOR_NONE },
 866   { "suggestionPicker.js", IDR_SUGGESTION_PICKER_JS, ui::SCALE_FACTOR_NONE },
 867   { "suggestionPicker.css", IDR_SUGGESTION_PICKER_CSS, ui::SCALE_FACTOR_NONE },
 868   { "colorSuggestionPicker.js",
 869     IDR_COLOR_SUGGESTION_PICKER_JS, ui::SCALE_FACTOR_NONE },
 870   { "colorSuggestionPicker.css",
 871     IDR_COLOR_SUGGESTION_PICKER_CSS, ui::SCALE_FACTOR_NONE },
 872 #endif
 873 };
 874
 875 }  // namespace
 876
 877 WebData BlinkPlatformImpl::loadResource(const char* name) {
 878   // Some clients will call into this method with an empty |name| when they have
 879   // optional resources.  For example, the PopupMenuChromium code can have icons
 880   // for some Autofill items but not for others.
 881   if (!strlen(name))
 882     return WebData();
 883
 884   // Check the name prefix to see if it's an audio resource.
 885   if (StartsWithASCII(name, "IRC_Composite", true) ||
 886       StartsWithASCII(name, "Composite", true))
 887     return loadAudioSpatializationResource(name);
 888
 889   // TODO(flackr): We should use a better than linear search here, a trie would
 890   // be ideal.
 891   for (size_t i = 0; i < arraysize(kDataResources); ++i) {
 892     if (!strcmp(name, kDataResources[i].name)) {
 893       base::StringPiece resource = GetContentClient()->GetDataResource(
 894           kDataResources[i].id, kDataResources[i].scale_factor);
 895       return WebData(resource.data(), resource.size());
 896     }
 897   }
 898
 899   NOTREACHED() << "Unknown image resource " << name;
 900   return WebData();
 901 }
 902
 903 WebString BlinkPlatformImpl::queryLocalizedString(
 904     WebLocalizedString::Name name) {
 905   int message_id = ToMessageID(name);
 906   if (message_id < 0)
 907     return WebString();
 908   return GetContentClient()->GetLocalizedString(message_id);
 909 }
 910
 911 WebString BlinkPlatformImpl::queryLocalizedString(
 912     WebLocalizedString::Name name, int numeric_value) {
 913   return queryLocalizedString(name, base::IntToString16(numeric_value));
 914 }
 915
 916 WebString BlinkPlatformImpl::queryLocalizedString(
 917     WebLocalizedString::Name name, const WebString& value) {
 918   int message_id = ToMessageID(name);
 919   if (message_id < 0)
 920     return WebString();
 921   return ReplaceStringPlaceholders(GetContentClient()->GetLocalizedString(
 922       message_id), value, NULL);
 923 }
 924
 925 WebString BlinkPlatformImpl::queryLocalizedString(
 926     WebLocalizedString::Name name,
 927     const WebString& value1,
 928     const WebString& value2) {
 929   int message_id = ToMessageID(name);
 930   if (message_id < 0)
 931     return WebString();
 932   std::vector<base::string16> values;
 933   values.reserve(2);
 934   values.push_back(value1);
 935   values.push_back(value2);
 936   return ReplaceStringPlaceholders(
 937       GetContentClient()->GetLocalizedString(message_id), values, NULL);
 938 }
 939
 940 double BlinkPlatformImpl::currentTime() {
 941   return base::Time::Now().ToDoubleT();
 942 }
 943
 944 double BlinkPlatformImpl::monotonicallyIncreasingTime() {
 945   return base::TimeTicks::Now().ToInternalValue() /
 946       static_cast<double>(base::Time::kMicrosecondsPerSecond);
 947 }
 948
 949 void BlinkPlatformImpl::cryptographicallyRandomValues(
 950     unsigned char* buffer, size_t length) {
 951   base::RandBytes(buffer, length);
 952 }
 953
 954 void BlinkPlatformImpl::setSharedTimerFiredFunction(void (*func)()) {
 955   shared_timer_func_ = func;
 956 }
 957
 958 void BlinkPlatformImpl::setSharedTimerFireInterval(
 959     double interval_seconds) {
 960   shared_timer_fire_time_ = interval_seconds + monotonicallyIncreasingTime();
 961   if (shared_timer_suspended_) {
 962     shared_timer_fire_time_was_set_while_suspended_ = true;
 963     return;
 964   }
 965
 966   // By converting between double and int64 representation, we run the risk
 967   // of losing precision due to rounding errors. Performing computations in
 968   // microseconds reduces this risk somewhat. But there still is the potential
 969   // of us computing a fire time for the timer that is shorter than what we
 970   // need.
 971   // As the event loop will check event deadlines prior to actually firing
 972   // them, there is a risk of needlessly rescheduling events and of
 973   // needlessly looping if sleep times are too short even by small amounts.
 974   // This results in measurable performance degradation unless we use ceil() to
 975   // always round up the sleep times.
 976   int64 interval = static_cast<int64>(
 977       ceil(interval_seconds * base::Time::kMillisecondsPerSecond)
 978       * base::Time::kMicrosecondsPerMillisecond);
 979
 980   if (interval < 0)
 981     interval = 0;
 982
 983   shared_timer_.Stop();
 984   shared_timer_.Start(FROM_HERE, base::TimeDelta::FromMicroseconds(interval),
 985                       this, &BlinkPlatformImpl::DoTimeout);
 986   OnStartSharedTimer(base::TimeDelta::FromMicroseconds(interval));
 987 }
 988
 989 void BlinkPlatformImpl::stopSharedTimer() {
 990   shared_timer_.Stop();
 991 }
 992
 993 void BlinkPlatformImpl::callOnMainThread(
 994     void (*func)(void*), void* context) {
 995   main_loop_->PostTask(FROM_HERE, base::Bind(func, context));
 996 }
 997
 998 blink::WebGestureCurve* BlinkPlatformImpl::createFlingAnimationCurve(
 999     blink::WebGestureDevice device_source,
1000     const blink::WebFloatPoint& velocity,
1001     const blink::WebSize& cumulative_scroll) {
1002   auto curve = WebGestureCurveImpl::CreateFromDefaultPlatformCurve(
1003       gfx::Vector2dF(velocity.x, velocity.y),
1004       gfx::Vector2dF(cumulative_scroll.width, cumulative_scroll.height));
1005   return curve.release();
1006 }
1007
1008 void BlinkPlatformImpl::didStartWorkerRunLoop(
1009     const blink::WebWorkerRunLoop& runLoop) {
1010   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
1011   worker_task_runner->OnWorkerRunLoopStarted(runLoop);
1012 }
1013
1014 void BlinkPlatformImpl::didStopWorkerRunLoop(
1015     const blink::WebWorkerRunLoop& runLoop) {
1016   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
1017   worker_task_runner->OnWorkerRunLoopStopped(runLoop);
1018 }
1019
1020 blink::WebCrypto* BlinkPlatformImpl::crypto() {
1021   return &web_crypto_;
1022 }
1023
1024 blink::WebGeofencingProvider* BlinkPlatformImpl::geofencingProvider() {
1025   return geofencing_provider_.get();
1026 }
1027
1028 blink::WebNotificationManager*
1029 BlinkPlatformImpl::notificationManager() {
1030   if (!thread_safe_sender_.get() || !notification_dispatcher_.get())
1031     return nullptr;
1032
1033   return NotificationManager::ThreadSpecificInstance(
1034       thread_safe_sender_.get(),
1035       notification_dispatcher_.get());
1036 }
1037
1038 WebThemeEngine* BlinkPlatformImpl::themeEngine() {
1039   return &native_theme_engine_;
1040 }
1041
1042 WebFallbackThemeEngine* BlinkPlatformImpl::fallbackThemeEngine() {
1043   return &fallback_theme_engine_;
1044 }
1045
1046 blink::Platform::FileHandle BlinkPlatformImpl::databaseOpenFile(
1047     const blink::WebString& vfs_file_name, int desired_flags) {
1048 #if defined(OS_WIN)
1049   return INVALID_HANDLE_VALUE;
1050 #elif defined(OS_POSIX)
1051   return -1;
1052 #endif
1053 }
1054
1055 int BlinkPlatformImpl::databaseDeleteFile(
1056     const blink::WebString& vfs_file_name, bool sync_dir) {
1057   return -1;
1058 }
1059
1060 long BlinkPlatformImpl::databaseGetFileAttributes(
1061     const blink::WebString& vfs_file_name) {
1062   return 0;
1063 }
1064
1065 long long BlinkPlatformImpl::databaseGetFileSize(
1066     const blink::WebString& vfs_file_name) {
1067   return 0;
1068 }
1069
1070 long long BlinkPlatformImpl::databaseGetSpaceAvailableForOrigin(
1071     const blink::WebString& origin_identifier) {
1072   return 0;
1073 }
1074
1075 blink::WebString BlinkPlatformImpl::signedPublicKeyAndChallengeString(
1076     unsigned key_size_index,
1077     const blink::WebString& challenge,
1078     const blink::WebURL& url) {
1079   return blink::WebString("");
1080 }
1081
1082 static scoped_ptr<base::ProcessMetrics> CurrentProcessMetrics() {
1083   using base::ProcessMetrics;
1084 #if defined(OS_MACOSX)
1085   return scoped_ptr<ProcessMetrics>(
1086       // The default port provider is sufficient to get data for the current
1087       // process.
1088       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
1089                                            NULL));
1090 #else
1091   return scoped_ptr<ProcessMetrics>(
1092       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle()));
1093 #endif
1094 }
1095
1096 static size_t getMemoryUsageMB(bool bypass_cache) {
1097   size_t current_mem_usage = 0;
1098   MemoryUsageCache* mem_usage_cache_singleton = MemoryUsageCache::GetInstance();
1099   if (!bypass_cache &&
1100       mem_usage_cache_singleton->IsCachedValueValid(&current_mem_usage))
1101     return current_mem_usage;
1102
1103   current_mem_usage = GetMemoryUsageKB() >> 10;
1104   mem_usage_cache_singleton->SetMemoryValue(current_mem_usage);
1105   return current_mem_usage;
1106 }
1107
1108 size_t BlinkPlatformImpl::memoryUsageMB() {
1109   return getMemoryUsageMB(false);
1110 }
1111
1112 size_t BlinkPlatformImpl::actualMemoryUsageMB() {
1113   return getMemoryUsageMB(true);
1114 }
1115
1116 size_t BlinkPlatformImpl::physicalMemoryMB() {
1117   return static_cast<size_t>(base::SysInfo::AmountOfPhysicalMemoryMB());
1118 }
1119
1120 size_t BlinkPlatformImpl::virtualMemoryLimitMB() {
1121   return static_cast<size_t>(base::SysInfo::AmountOfVirtualMemoryMB());
1122 }
1123
1124 size_t BlinkPlatformImpl::numberOfProcessors() {
1125   return static_cast<size_t>(base::SysInfo::NumberOfProcessors());
1126 }
1127
1128 void BlinkPlatformImpl::startHeapProfiling(
1129   const blink::WebString& prefix) {
1130   // FIXME(morrita): Make this built on windows.
1131 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1132   HeapProfilerStart(prefix.utf8().data());
1133 #endif
1134 }
1135
1136 void BlinkPlatformImpl::stopHeapProfiling() {
1137 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1138   HeapProfilerStop();
1139 #endif
1140 }
1141
1142 void BlinkPlatformImpl::dumpHeapProfiling(
1143   const blink::WebString& reason) {
1144 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1145   HeapProfilerDump(reason.utf8().data());
1146 #endif
1147 }
1148
1149 WebString BlinkPlatformImpl::getHeapProfile() {
1150 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1151   char* data = GetHeapProfile();
1152   WebString result = WebString::fromUTF8(std::string(data));
1153   free(data);
1154   return result;
1155 #else
1156   return WebString();
1157 #endif
1158 }
1159
1160 bool BlinkPlatformImpl::processMemorySizesInBytes(
1161     size_t* private_bytes,
1162     size_t* shared_bytes) {
1163   return CurrentProcessMetrics()->GetMemoryBytes(private_bytes, shared_bytes);
1164 }
1165
1166 bool BlinkPlatformImpl::memoryAllocatorWasteInBytes(size_t* size) {
1167   return base::allocator::GetAllocatorWasteSize(size);
1168 }
1169
1170 blink::WebDiscardableMemory*
1171 BlinkPlatformImpl::allocateAndLockDiscardableMemory(size_t bytes) {
1172   base::DiscardableMemoryType type =
1173       base::DiscardableMemory::GetPreferredType();
1174   if (type == base::DISCARDABLE_MEMORY_TYPE_EMULATED)
1175     return NULL;
1176   return content::WebDiscardableMemoryImpl::CreateLockedMemory(bytes).release();
1177 }
1178
1179 size_t BlinkPlatformImpl::maxDecodedImageBytes() {
1180 #if defined(OS_ANDROID)
1181   if (base::SysInfo::IsLowEndDevice()) {
1182     // Limit image decoded size to 3M pixels on low end devices.
1183     // 4 is maximum number of bytes per pixel.
1184     return 3 * 1024 * 1024 * 4;
1185   }
1186   // For other devices, limit decoded image size based on the amount of physical
1187   // memory.
1188   // In some cases all physical memory is not accessible by Chromium, as it can
1189   // be reserved for direct use by certain hardware. Thus, we set the limit so
1190   // that 1.6GB of reported physical memory on a 2GB device is enough to set the
1191   // limit at 16M pixels, which is a desirable value since 4K*4K is a relatively
1192   // common texture size.
1193   return base::SysInfo::AmountOfPhysicalMemory() / 25;
1194 #else
1195   return noDecodedImageByteLimit;
1196 #endif
1197 }
1198
1199 void BlinkPlatformImpl::SuspendSharedTimer() {
1200   ++shared_timer_suspended_;
1201 }
1202
1203 void BlinkPlatformImpl::ResumeSharedTimer() {
1204   DCHECK_GT(shared_timer_suspended_, 0);
1205
1206   // The shared timer may have fired or been adjusted while we were suspended.
1207   if (--shared_timer_suspended_ == 0 &&
1208       (!shared_timer_.IsRunning() ||
1209        shared_timer_fire_time_was_set_while_suspended_)) {
1210     shared_timer_fire_time_was_set_while_suspended_ = false;
1211     setSharedTimerFireInterval(
1212         shared_timer_fire_time_ - monotonicallyIncreasingTime());
1213   }
1214 }
1215
1216 // static
1217 void BlinkPlatformImpl::DestroyCurrentThread(void* thread) {
1218   WebThreadImplForMessageLoop* impl =
1219       static_cast<WebThreadImplForMessageLoop*>(thread);
1220   delete impl;
1221 }
1222
1223 }  // namespace content