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/time/time.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/child_thread.h"
  33 #include "content/child/content_child_helpers.h"
  34 #include "content/child/fling_curve_configuration.h"
  35 #include "content/child/web_discardable_memory_impl.h"
  36 #include "content/child/web_socket_stream_handle_impl.h"
  37 #include "content/child/web_url_loader_impl.h"
  38 #include "content/child/websocket_bridge.h"
  39 #include "content/child/webthread_impl.h"
  40 #include "content/child/worker_task_runner.h"
  41 #include "content/public/common/content_client.h"
  42 #include "net/base/data_url.h"
  43 #include "net/base/mime_util.h"
  44 #include "net/base/net_errors.h"
  45 #include "net/base/net_util.h"
  46 #include "third_party/WebKit/public/platform/WebConvertableToTraceFormat.h"
  47 #include "third_party/WebKit/public/platform/WebData.h"
  48 #include "third_party/WebKit/public/platform/WebString.h"
  49 #include "third_party/WebKit/public/platform/WebURL.h"
  50 #include "third_party/WebKit/public/platform/WebWaitableEvent.h"
  51 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  52 #include "ui/base/layout.h"
  53
  54 #if defined(OS_ANDROID)
  55 #include "content/child/fling_animator_impl_android.h"
  56 #endif
  57
  58 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
  59 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
  60 #endif
  61
  62 using blink::WebData;
  63 using blink::WebFallbackThemeEngine;
  64 using blink::WebLocalizedString;
  65 using blink::WebString;
  66 using blink::WebSocketStreamHandle;
  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   virtual void AppendAsTraceFormat(std::string* out) const OVERRIDE {
 148     *out += convertable_.asTraceFormat().utf8();
 149   }
 150
 151  private:
 152   virtual ~ConvertableToTraceFormatWrapper() {}
 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::ValidationTypeMismatch:
 371       return IDS_FORM_VALIDATION_TYPE_MISMATCH;
 372     case WebLocalizedString::ValidationTypeMismatchForEmail:
 373       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL;
 374     case WebLocalizedString::ValidationTypeMismatchForEmailEmpty:
 375       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY;
 376     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain:
 377       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_DOMAIN;
 378     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal:
 379       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_LOCAL;
 380     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain:
 381       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOMAIN;
 382     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots:
 383       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOTS;
 384     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal:
 385       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_LOCAL;
 386     case WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign:
 387       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_NO_AT_SIGN;
 388     case WebLocalizedString::ValidationTypeMismatchForMultipleEmail:
 389       return IDS_FORM_VALIDATION_TYPE_MISMATCH_MULTIPLE_EMAIL;
 390     case WebLocalizedString::ValidationTypeMismatchForURL:
 391       return IDS_FORM_VALIDATION_TYPE_MISMATCH_URL;
 392     case WebLocalizedString::ValidationValueMissing:
 393       return IDS_FORM_VALIDATION_VALUE_MISSING;
 394     case WebLocalizedString::ValidationValueMissingForCheckbox:
 395       return IDS_FORM_VALIDATION_VALUE_MISSING_CHECKBOX;
 396     case WebLocalizedString::ValidationValueMissingForFile:
 397       return IDS_FORM_VALIDATION_VALUE_MISSING_FILE;
 398     case WebLocalizedString::ValidationValueMissingForMultipleFile:
 399       return IDS_FORM_VALIDATION_VALUE_MISSING_MULTIPLE_FILE;
 400     case WebLocalizedString::ValidationValueMissingForRadio:
 401       return IDS_FORM_VALIDATION_VALUE_MISSING_RADIO;
 402     case WebLocalizedString::ValidationValueMissingForSelect:
 403       return IDS_FORM_VALIDATION_VALUE_MISSING_SELECT;
 404     case WebLocalizedString::WeekFormatTemplate:
 405       return IDS_FORM_INPUT_WEEK_TEMPLATE;
 406     case WebLocalizedString::WeekNumberLabel:
 407       return IDS_FORM_WEEK_NUMBER_LABEL;
 408     // This "default:" line exists to avoid compile warnings about enum
 409     // coverage when we add a new symbol to WebLocalizedString.h in WebKit.
 410     // After a planned WebKit patch is landed, we need to add a case statement
 411     // for the added symbol here.
 412     default:
 413       break;
 414   }
 415   return -1;
 416 }
 417
 418 BlinkPlatformImpl::BlinkPlatformImpl()
 419     : main_loop_(base::MessageLoop::current()),
 420       shared_timer_func_(NULL),
 421       shared_timer_fire_time_(0.0),
 422       shared_timer_fire_time_was_set_while_suspended_(false),
 423       shared_timer_suspended_(0),
 424       fling_curve_configuration_(new FlingCurveConfiguration),
 425       current_thread_slot_(&DestroyCurrentThread) {}
 426
 427 BlinkPlatformImpl::~BlinkPlatformImpl() {
 428 }
 429
 430 WebURLLoader* BlinkPlatformImpl::createURLLoader() {
 431   ChildThread* child_thread = ChildThread::current();
 432   // There may be no child thread in RenderViewTests.  These tests can still use
 433   // data URLs to bypass the ResourceDispatcher.
 434   return new WebURLLoaderImpl(
 435       child_thread ? child_thread->resource_dispatcher() : NULL);
 436 }
 437
 438 WebSocketStreamHandle* BlinkPlatformImpl::createSocketStreamHandle() {
 439   return new WebSocketStreamHandleImpl;
 440 }
 441
 442 blink::WebSocketHandle* BlinkPlatformImpl::createWebSocketHandle() {
 443   return new WebSocketBridge;
 444 }
 445
 446 WebString BlinkPlatformImpl::userAgent() {
 447   return WebString::fromUTF8(GetContentClient()->GetUserAgent());
 448 }
 449
 450 WebData BlinkPlatformImpl::parseDataURL(const WebURL& url,
 451                                         WebString& mimetype_out,
 452                                         WebString& charset_out) {
 453   std::string mime_type, char_set, data;
 454   if (net::DataURL::Parse(url, &mime_type, &char_set, &data)
 455       && net::IsSupportedMimeType(mime_type)) {
 456     mimetype_out = WebString::fromUTF8(mime_type);
 457     charset_out = WebString::fromUTF8(char_set);
 458     return data;
 459   }
 460   return WebData();
 461 }
 462
 463 WebURLError BlinkPlatformImpl::cancelledError(
 464     const WebURL& unreachableURL) const {
 465   return WebURLLoaderImpl::CreateError(unreachableURL, false, net::ERR_ABORTED);
 466 }
 467
 468 bool BlinkPlatformImpl::isReservedIPAddress(
 469     const blink::WebSecurityOrigin& securityOrigin) const {
 470   return isHostnameReservedIPAddress(securityOrigin.host().utf8());
 471 }
 472
 473 bool BlinkPlatformImpl::isReservedIPAddress(const blink::WebURL& url) const {
 474   return isHostnameReservedIPAddress(GURL(url).host());
 475 }
 476
 477 blink::WebThread* BlinkPlatformImpl::createThread(const char* name) {
 478   return new WebThreadImpl(name);
 479 }
 480
 481 blink::WebThread* BlinkPlatformImpl::currentThread() {
 482   WebThreadImplForMessageLoop* thread =
 483       static_cast<WebThreadImplForMessageLoop*>(current_thread_slot_.Get());
 484   if (thread)
 485     return (thread);
 486
 487   scoped_refptr<base::MessageLoopProxy> message_loop =
 488       base::MessageLoopProxy::current();
 489   if (!message_loop.get())
 490     return NULL;
 491
 492   thread = new WebThreadImplForMessageLoop(message_loop.get());
 493   current_thread_slot_.Set(thread);
 494   return thread;
 495 }
 496
 497 blink::WebWaitableEvent* BlinkPlatformImpl::createWaitableEvent() {
 498   return new WebWaitableEventImpl();
 499 }
 500
 501 blink::WebWaitableEvent* BlinkPlatformImpl::waitMultipleEvents(
 502     const blink::WebVector<blink::WebWaitableEvent*>& web_events) {
 503   std::vector<base::WaitableEvent*> events;
 504   for (size_t i = 0; i < web_events.size(); ++i)
 505     events.push_back(static_cast<WebWaitableEventImpl*>(web_events[i])->impl());
 506   size_t idx = base::WaitableEvent::WaitMany(
 507       vector_as_array(&events), events.size());
 508   DCHECK_LT(idx, web_events.size());
 509   return web_events[idx];
 510 }
 511
 512 void BlinkPlatformImpl::decrementStatsCounter(const char* name) {
 513   base::StatsCounter(name).Decrement();
 514 }
 515
 516 void BlinkPlatformImpl::incrementStatsCounter(const char* name) {
 517   base::StatsCounter(name).Increment();
 518 }
 519
 520 void BlinkPlatformImpl::histogramCustomCounts(
 521     const char* name, int sample, int min, int max, int bucket_count) {
 522   // Copied from histogram macro, but without the static variable caching
 523   // the histogram because name is dynamic.
 524   base::HistogramBase* counter =
 525       base::Histogram::FactoryGet(name, min, max, bucket_count,
 526           base::HistogramBase::kUmaTargetedHistogramFlag);
 527   DCHECK_EQ(name, counter->histogram_name());
 528   counter->Add(sample);
 529 }
 530
 531 void BlinkPlatformImpl::histogramEnumeration(
 532     const char* name, int sample, int boundary_value) {
 533   // Copied from histogram macro, but without the static variable caching
 534   // the histogram because name is dynamic.
 535   base::HistogramBase* counter =
 536       base::LinearHistogram::FactoryGet(name, 1, boundary_value,
 537           boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag);
 538   DCHECK_EQ(name, counter->histogram_name());
 539   counter->Add(sample);
 540 }
 541
 542 void BlinkPlatformImpl::histogramSparse(const char* name, int sample) {
 543   // For sparse histograms, we can use the macro, as it does not incorporate a
 544   // static.
 545   UMA_HISTOGRAM_SPARSE_SLOWLY(name, sample);
 546 }
 547
 548 const unsigned char* BlinkPlatformImpl::getTraceCategoryEnabledFlag(
 549     const char* category_group) {
 550   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 551 }
 552
 553 long* BlinkPlatformImpl::getTraceSamplingState(
 554     const unsigned thread_bucket) {
 555   switch (thread_bucket) {
 556     case 0:
 557       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(0));
 558     case 1:
 559       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(1));
 560     case 2:
 561       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(2));
 562     default:
 563       NOTREACHED() << "Unknown thread bucket type.";
 564   }
 565   return NULL;
 566 }
 567
 568 COMPILE_ASSERT(
 569     sizeof(blink::Platform::TraceEventHandle) ==
 570         sizeof(base::debug::TraceEventHandle),
 571     TraceEventHandle_types_must_be_same_size);
 572
 573 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 574     char phase,
 575     const unsigned char* category_group_enabled,
 576     const char* name,
 577     unsigned long long id,
 578     int num_args,
 579     const char** arg_names,
 580     const unsigned char* arg_types,
 581     const unsigned long long* arg_values,
 582     unsigned char flags) {
 583   base::debug::TraceEventHandle handle = TRACE_EVENT_API_ADD_TRACE_EVENT(
 584       phase, category_group_enabled, name, id,
 585       num_args, arg_names, arg_types, arg_values, NULL, flags);
 586   blink::Platform::TraceEventHandle result;
 587   memcpy(&result, &handle, sizeof(result));
 588   return result;
 589 }
 590
 591 blink::Platform::TraceEventHandle BlinkPlatformImpl::addTraceEvent(
 592     char phase,
 593     const unsigned char* category_group_enabled,
 594     const char* name,
 595     unsigned long long id,
 596     int num_args,
 597     const char** arg_names,
 598     const unsigned char* arg_types,
 599     const unsigned long long* arg_values,
 600     const blink::WebConvertableToTraceFormat* convertable_values,
 601     unsigned char flags) {
 602   scoped_refptr<base::debug::ConvertableToTraceFormat> convertable_wrappers[2];
 603   if (convertable_values) {
 604     size_t size = std::min(static_cast<size_t>(num_args),
 605                            arraysize(convertable_wrappers));
 606     for (size_t i = 0; i < size; ++i) {
 607       if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) {
 608         convertable_wrappers[i] =
 609             new ConvertableToTraceFormatWrapper(convertable_values[i]);
 610       }
 611     }
 612   }
 613   base::debug::TraceEventHandle handle =
 614       TRACE_EVENT_API_ADD_TRACE_EVENT(phase,
 615                                       category_group_enabled,
 616                                       name,
 617                                       id,
 618                                       num_args,
 619                                       arg_names,
 620                                       arg_types,
 621                                       arg_values,
 622                                       convertable_wrappers,
 623                                       flags);
 624   blink::Platform::TraceEventHandle result;
 625   memcpy(&result, &handle, sizeof(result));
 626   return result;
 627 }
 628
 629 void BlinkPlatformImpl::updateTraceEventDuration(
 630     const unsigned char* category_group_enabled,
 631     const char* name,
 632     TraceEventHandle handle) {
 633   base::debug::TraceEventHandle traceEventHandle;
 634   memcpy(&traceEventHandle, &handle, sizeof(handle));
 635   TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
 636       category_group_enabled, name, traceEventHandle);
 637 }
 638
 639 namespace {
 640
 641 WebData loadAudioSpatializationResource(const char* name) {
 642 #ifdef IDR_AUDIO_SPATIALIZATION_COMPOSITE
 643   if (!strcmp(name, "Composite")) {
 644     base::StringPiece resource = GetContentClient()->GetDataResource(
 645         IDR_AUDIO_SPATIALIZATION_COMPOSITE, ui::SCALE_FACTOR_NONE);
 646     return WebData(resource.data(), resource.size());
 647   }
 648 #endif
 649
 650 #ifdef IDR_AUDIO_SPATIALIZATION_T000_P000
 651   const size_t kExpectedSpatializationNameLength = 31;
 652   if (strlen(name) != kExpectedSpatializationNameLength) {
 653     return WebData();
 654   }
 655
 656   // Extract the azimuth and elevation from the resource name.
 657   int azimuth = 0;
 658   int elevation = 0;
 659   int values_parsed =
 660       sscanf(name, "IRC_Composite_C_R0195_T%3d_P%3d", &azimuth, &elevation);
 661   if (values_parsed != 2) {
 662     return WebData();
 663   }
 664
 665   // The resource index values go through the elevations first, then azimuths.
 666   const int kAngleSpacing = 15;
 667
 668   // 0 <= elevation <= 90 (or 315 <= elevation <= 345)
 669   // in increments of 15 degrees.
 670   int elevation_index =
 671       elevation <= 90 ? elevation / kAngleSpacing :
 672       7 + (elevation - 315) / kAngleSpacing;
 673   bool is_elevation_index_good = 0 <= elevation_index && elevation_index < 10;
 674
 675   // 0 <= azimuth < 360 in increments of 15 degrees.
 676   int azimuth_index = azimuth / kAngleSpacing;
 677   bool is_azimuth_index_good = 0 <= azimuth_index && azimuth_index < 24;
 678
 679   const int kNumberOfElevations = 10;
 680   const int kNumberOfAudioResources = 240;
 681   int resource_index = kNumberOfElevations * azimuth_index + elevation_index;
 682   bool is_resource_index_good = 0 <= resource_index &&
 683       resource_index < kNumberOfAudioResources;
 684
 685   if (is_azimuth_index_good && is_elevation_index_good &&
 686       is_resource_index_good) {
 687     const int kFirstAudioResourceIndex = IDR_AUDIO_SPATIALIZATION_T000_P000;
 688     base::StringPiece resource = GetContentClient()->GetDataResource(
 689         kFirstAudioResourceIndex + resource_index, ui::SCALE_FACTOR_NONE);
 690     return WebData(resource.data(), resource.size());
 691   }
 692 #endif  // IDR_AUDIO_SPATIALIZATION_T000_P000
 693
 694   NOTREACHED();
 695   return WebData();
 696 }
 697
 698 struct DataResource {
 699   const char* name;
 700   int id;
 701   ui::ScaleFactor scale_factor;
 702 };
 703
 704 const DataResource kDataResources[] = {
 705   { "missingImage", IDR_BROKENIMAGE, ui::SCALE_FACTOR_100P },
 706   { "missingImage@2x", IDR_BROKENIMAGE, ui::SCALE_FACTOR_200P },
 707   { "mediaplayerPause", IDR_MEDIAPLAYER_PAUSE_BUTTON, ui::SCALE_FACTOR_100P },
 708   { "mediaplayerPauseHover",
 709     IDR_MEDIAPLAYER_PAUSE_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 710   { "mediaplayerPauseDown",
 711     IDR_MEDIAPLAYER_PAUSE_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 712   { "mediaplayerPlay", IDR_MEDIAPLAYER_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 713   { "mediaplayerPlayHover",
 714     IDR_MEDIAPLAYER_PLAY_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 715   { "mediaplayerPlayDown",
 716     IDR_MEDIAPLAYER_PLAY_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 717   { "mediaplayerPlayDisabled",
 718     IDR_MEDIAPLAYER_PLAY_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 719   { "mediaplayerSoundLevel3",
 720     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON, ui::SCALE_FACTOR_100P },
 721   { "mediaplayerSoundLevel3Hover",
 722     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 723   { "mediaplayerSoundLevel3Down",
 724     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 725   { "mediaplayerSoundLevel2",
 726     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON, ui::SCALE_FACTOR_100P },
 727   { "mediaplayerSoundLevel2Hover",
 728     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 729   { "mediaplayerSoundLevel2Down",
 730     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 731   { "mediaplayerSoundLevel1",
 732     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON, ui::SCALE_FACTOR_100P },
 733   { "mediaplayerSoundLevel1Hover",
 734     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 735   { "mediaplayerSoundLevel1Down",
 736     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 737   { "mediaplayerSoundLevel0",
 738     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON, ui::SCALE_FACTOR_100P },
 739   { "mediaplayerSoundLevel0Hover",
 740     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 741   { "mediaplayerSoundLevel0Down",
 742     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 743   { "mediaplayerSoundDisabled",
 744     IDR_MEDIAPLAYER_SOUND_DISABLED, ui::SCALE_FACTOR_100P },
 745   { "mediaplayerSliderThumb",
 746     IDR_MEDIAPLAYER_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 747   { "mediaplayerSliderThumbHover",
 748     IDR_MEDIAPLAYER_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 749   { "mediaplayerSliderThumbDown",
 750     IDR_MEDIAPLAYER_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 751   { "mediaplayerVolumeSliderThumb",
 752     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 753   { "mediaplayerVolumeSliderThumbHover",
 754     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 755   { "mediaplayerVolumeSliderThumbDown",
 756     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 757   { "mediaplayerVolumeSliderThumbDisabled",
 758     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DISABLED, ui::SCALE_FACTOR_100P },
 759   { "mediaplayerClosedCaption",
 760     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON, ui::SCALE_FACTOR_100P },
 761   { "mediaplayerClosedCaptionHover",
 762     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 763   { "mediaplayerClosedCaptionDown",
 764     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 765   { "mediaplayerClosedCaptionDisabled",
 766     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 767   { "mediaplayerFullscreen",
 768     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON, ui::SCALE_FACTOR_100P },
 769   { "mediaplayerFullscreenHover",
 770     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 771   { "mediaplayerFullscreenDown",
 772     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 773   { "mediaplayerCastOff",
 774     IDR_MEDIAPLAYER_CAST_BUTTON_OFF, ui::SCALE_FACTOR_100P },
 775   { "mediaplayerCastOn",
 776     IDR_MEDIAPLAYER_CAST_BUTTON_ON, ui::SCALE_FACTOR_100P },
 777   { "mediaplayerFullscreenDisabled",
 778     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 779   { "mediaplayerOverlayPlay",
 780     IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 781 #if defined(OS_MACOSX)
 782   { "overhangPattern", IDR_OVERHANG_PATTERN, ui::SCALE_FACTOR_100P },
 783   { "overhangShadow", IDR_OVERHANG_SHADOW, ui::SCALE_FACTOR_100P },
 784 #endif
 785   { "panIcon", IDR_PAN_SCROLL_ICON, ui::SCALE_FACTOR_100P },
 786   { "searchCancel", IDR_SEARCH_CANCEL, ui::SCALE_FACTOR_100P },
 787   { "searchCancelPressed", IDR_SEARCH_CANCEL_PRESSED, ui::SCALE_FACTOR_100P },
 788   { "searchMagnifier", IDR_SEARCH_MAGNIFIER, ui::SCALE_FACTOR_100P },
 789   { "searchMagnifierResults",
 790     IDR_SEARCH_MAGNIFIER_RESULTS, ui::SCALE_FACTOR_100P },
 791   { "textAreaResizeCorner", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_100P },
 792   { "textAreaResizeCorner@2x", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_200P },
 793   { "generatePassword", IDR_PASSWORD_GENERATION_ICON, ui::SCALE_FACTOR_100P },
 794   { "generatePasswordHover",
 795     IDR_PASSWORD_GENERATION_ICON_HOVER, ui::SCALE_FACTOR_100P },
 796   { "html.css", IDR_UASTYLE_HTML_CSS, ui::SCALE_FACTOR_NONE },
 797   { "quirks.css", IDR_UASTYLE_QUIRKS_CSS, ui::SCALE_FACTOR_NONE },
 798   { "view-source.css", IDR_UASTYLE_VIEW_SOURCE_CSS, ui::SCALE_FACTOR_NONE },
 799   { "themeChromium.css", IDR_UASTYLE_THEME_CHROMIUM_CSS,
 800     ui::SCALE_FACTOR_NONE },
 801 #if defined(OS_ANDROID)
 802   { "themeChromiumAndroid.css", IDR_UASTYLE_THEME_CHROMIUM_ANDROID_CSS,
 803     ui::SCALE_FACTOR_NONE },
 804   { "mediaControlsAndroid.css", IDR_UASTYLE_MEDIA_CONTROLS_ANDROID_CSS,
 805     ui::SCALE_FACTOR_NONE },
 806 #endif
 807 #if !defined(OS_WIN)
 808   { "themeChromiumLinux.css", IDR_UASTYLE_THEME_CHROMIUM_LINUX_CSS,
 809     ui::SCALE_FACTOR_NONE },
 810 #endif
 811   { "themeChromiumSkia.css", IDR_UASTYLE_THEME_CHROMIUM_SKIA_CSS,
 812     ui::SCALE_FACTOR_NONE },
 813   { "themeInputMultipleFields.css",
 814     IDR_UASTYLE_THEME_INPUT_MULTIPLE_FIELDS_CSS, ui::SCALE_FACTOR_NONE },
 815 #if defined(OS_MACOSX)
 816   { "themeMac.css", IDR_UASTYLE_THEME_MAC_CSS, ui::SCALE_FACTOR_NONE },
 817 #endif
 818   { "themeWin.css", IDR_UASTYLE_THEME_WIN_CSS, ui::SCALE_FACTOR_NONE },
 819   { "themeWinQuirks.css", IDR_UASTYLE_THEME_WIN_QUIRKS_CSS,
 820     ui::SCALE_FACTOR_NONE },
 821   { "svg.css", IDR_UASTYLE_SVG_CSS, ui::SCALE_FACTOR_NONE},
 822   { "navigationTransitions.css", IDR_UASTYLE_NAVIGATION_TRANSITIONS_CSS,
 823     ui::SCALE_FACTOR_NONE },
 824   { "mathml.css", IDR_UASTYLE_MATHML_CSS, ui::SCALE_FACTOR_NONE},
 825   { "mediaControls.css", IDR_UASTYLE_MEDIA_CONTROLS_CSS,
 826     ui::SCALE_FACTOR_NONE },
 827   { "fullscreen.css", IDR_UASTYLE_FULLSCREEN_CSS, ui::SCALE_FACTOR_NONE},
 828   { "xhtmlmp.css", IDR_UASTYLE_XHTMLMP_CSS, ui::SCALE_FACTOR_NONE},
 829   { "viewportAndroid.css", IDR_UASTYLE_VIEWPORT_ANDROID_CSS,
 830     ui::SCALE_FACTOR_NONE},
 831   { "InspectorOverlayPage.html", IDR_INSPECTOR_OVERLAY_PAGE_HTML,
 832     ui::SCALE_FACTOR_NONE },
 833   { "InjectedScriptCanvasModuleSource.js",
 834     IDR_INSPECTOR_INJECTED_SCRIPT_CANVAS_MODULE_SOURCE_JS,
 835     ui::SCALE_FACTOR_NONE },
 836   { "InjectedScriptSource.js", IDR_INSPECTOR_INJECTED_SCRIPT_SOURCE_JS,
 837     ui::SCALE_FACTOR_NONE },
 838   { "DebuggerScriptSource.js", IDR_INSPECTOR_DEBUGGER_SCRIPT_SOURCE_JS,
 839     ui::SCALE_FACTOR_NONE },
 840   { "DocumentXMLTreeViewer.js", IDR_PRIVATE_SCRIPT_DOCUMENTXMLTREEVIEWER_JS,
 841     ui::SCALE_FACTOR_NONE },
 842   { "HTMLMarqueeElement.js", IDR_PRIVATE_SCRIPT_HTMLMARQUEEELEMENT_JS,
 843     ui::SCALE_FACTOR_NONE },
 844   { "PluginPlaceholderElement.js",
 845     IDR_PRIVATE_SCRIPT_PLUGINPLACEHOLDERELEMENT_JS, ui::SCALE_FACTOR_NONE },
 846   { "PrivateScriptRunner.js", IDR_PRIVATE_SCRIPT_PRIVATESCRIPTRUNNER_JS,
 847     ui::SCALE_FACTOR_NONE },
 848 #ifdef IDR_PICKER_COMMON_JS
 849   { "pickerCommon.js", IDR_PICKER_COMMON_JS, ui::SCALE_FACTOR_NONE },
 850   { "pickerCommon.css", IDR_PICKER_COMMON_CSS, ui::SCALE_FACTOR_NONE },
 851   { "calendarPicker.js", IDR_CALENDAR_PICKER_JS, ui::SCALE_FACTOR_NONE },
 852   { "calendarPicker.css", IDR_CALENDAR_PICKER_CSS, ui::SCALE_FACTOR_NONE },
 853   { "pickerButton.css", IDR_PICKER_BUTTON_CSS, ui::SCALE_FACTOR_NONE },
 854   { "suggestionPicker.js", IDR_SUGGESTION_PICKER_JS, ui::SCALE_FACTOR_NONE },
 855   { "suggestionPicker.css", IDR_SUGGESTION_PICKER_CSS, ui::SCALE_FACTOR_NONE },
 856   { "colorSuggestionPicker.js",
 857     IDR_COLOR_SUGGESTION_PICKER_JS, ui::SCALE_FACTOR_NONE },
 858   { "colorSuggestionPicker.css",
 859     IDR_COLOR_SUGGESTION_PICKER_CSS, ui::SCALE_FACTOR_NONE },
 860 #endif
 861 };
 862
 863 }  // namespace
 864
 865 WebData BlinkPlatformImpl::loadResource(const char* name) {
 866   // Some clients will call into this method with an empty |name| when they have
 867   // optional resources.  For example, the PopupMenuChromium code can have icons
 868   // for some Autofill items but not for others.
 869   if (!strlen(name))
 870     return WebData();
 871
 872   // Check the name prefix to see if it's an audio resource.
 873   if (StartsWithASCII(name, "IRC_Composite", true) ||
 874       StartsWithASCII(name, "Composite", true))
 875     return loadAudioSpatializationResource(name);
 876
 877   // TODO(flackr): We should use a better than linear search here, a trie would
 878   // be ideal.
 879   for (size_t i = 0; i < arraysize(kDataResources); ++i) {
 880     if (!strcmp(name, kDataResources[i].name)) {
 881       base::StringPiece resource = GetContentClient()->GetDataResource(
 882           kDataResources[i].id, kDataResources[i].scale_factor);
 883       return WebData(resource.data(), resource.size());
 884     }
 885   }
 886
 887   NOTREACHED() << "Unknown image resource " << name;
 888   return WebData();
 889 }
 890
 891 WebString BlinkPlatformImpl::queryLocalizedString(
 892     WebLocalizedString::Name name) {
 893   int message_id = ToMessageID(name);
 894   if (message_id < 0)
 895     return WebString();
 896   return GetContentClient()->GetLocalizedString(message_id);
 897 }
 898
 899 WebString BlinkPlatformImpl::queryLocalizedString(
 900     WebLocalizedString::Name name, int numeric_value) {
 901   return queryLocalizedString(name, base::IntToString16(numeric_value));
 902 }
 903
 904 WebString BlinkPlatformImpl::queryLocalizedString(
 905     WebLocalizedString::Name name, const WebString& value) {
 906   int message_id = ToMessageID(name);
 907   if (message_id < 0)
 908     return WebString();
 909   return ReplaceStringPlaceholders(GetContentClient()->GetLocalizedString(
 910       message_id), value, NULL);
 911 }
 912
 913 WebString BlinkPlatformImpl::queryLocalizedString(
 914     WebLocalizedString::Name name,
 915     const WebString& value1,
 916     const WebString& value2) {
 917   int message_id = ToMessageID(name);
 918   if (message_id < 0)
 919     return WebString();
 920   std::vector<base::string16> values;
 921   values.reserve(2);
 922   values.push_back(value1);
 923   values.push_back(value2);
 924   return ReplaceStringPlaceholders(
 925       GetContentClient()->GetLocalizedString(message_id), values, NULL);
 926 }
 927
 928 double BlinkPlatformImpl::currentTime() {
 929   return base::Time::Now().ToDoubleT();
 930 }
 931
 932 double BlinkPlatformImpl::monotonicallyIncreasingTime() {
 933   return base::TimeTicks::Now().ToInternalValue() /
 934       static_cast<double>(base::Time::kMicrosecondsPerSecond);
 935 }
 936
 937 void BlinkPlatformImpl::cryptographicallyRandomValues(
 938     unsigned char* buffer, size_t length) {
 939   base::RandBytes(buffer, length);
 940 }
 941
 942 void BlinkPlatformImpl::setSharedTimerFiredFunction(void (*func)()) {
 943   shared_timer_func_ = func;
 944 }
 945
 946 void BlinkPlatformImpl::setSharedTimerFireInterval(
 947     double interval_seconds) {
 948   shared_timer_fire_time_ = interval_seconds + monotonicallyIncreasingTime();
 949   if (shared_timer_suspended_) {
 950     shared_timer_fire_time_was_set_while_suspended_ = true;
 951     return;
 952   }
 953
 954   // By converting between double and int64 representation, we run the risk
 955   // of losing precision due to rounding errors. Performing computations in
 956   // microseconds reduces this risk somewhat. But there still is the potential
 957   // of us computing a fire time for the timer that is shorter than what we
 958   // need.
 959   // As the event loop will check event deadlines prior to actually firing
 960   // them, there is a risk of needlessly rescheduling events and of
 961   // needlessly looping if sleep times are too short even by small amounts.
 962   // This results in measurable performance degradation unless we use ceil() to
 963   // always round up the sleep times.
 964   int64 interval = static_cast<int64>(
 965       ceil(interval_seconds * base::Time::kMillisecondsPerSecond)
 966       * base::Time::kMicrosecondsPerMillisecond);
 967
 968   if (interval < 0)
 969     interval = 0;
 970
 971   shared_timer_.Stop();
 972   shared_timer_.Start(FROM_HERE, base::TimeDelta::FromMicroseconds(interval),
 973                       this, &BlinkPlatformImpl::DoTimeout);
 974   OnStartSharedTimer(base::TimeDelta::FromMicroseconds(interval));
 975 }
 976
 977 void BlinkPlatformImpl::stopSharedTimer() {
 978   shared_timer_.Stop();
 979 }
 980
 981 void BlinkPlatformImpl::callOnMainThread(
 982     void (*func)(void*), void* context) {
 983   main_loop_->PostTask(FROM_HERE, base::Bind(func, context));
 984 }
 985
 986 blink::WebGestureCurve* BlinkPlatformImpl::createFlingAnimationCurve(
 987     blink::WebGestureDevice device_source,
 988     const blink::WebFloatPoint& velocity,
 989     const blink::WebSize& cumulative_scroll) {
 990 #if defined(OS_ANDROID)
 991   return FlingAnimatorImpl::CreateAndroidGestureCurve(
 992       velocity,
 993       cumulative_scroll);
 994 #endif
 995
 996   if (device_source == blink::WebGestureDeviceTouchscreen)
 997     return fling_curve_configuration_->CreateForTouchScreen(velocity,
 998                                                             cumulative_scroll);
 999
1000   return fling_curve_configuration_->CreateForTouchPad(velocity,
1001                                                        cumulative_scroll);
1002 }
1003
1004 void BlinkPlatformImpl::didStartWorkerRunLoop(
1005     const blink::WebWorkerRunLoop& runLoop) {
1006   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
1007   worker_task_runner->OnWorkerRunLoopStarted(runLoop);
1008 }
1009
1010 void BlinkPlatformImpl::didStopWorkerRunLoop(
1011     const blink::WebWorkerRunLoop& runLoop) {
1012   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
1013   worker_task_runner->OnWorkerRunLoopStopped(runLoop);
1014 }
1015
1016 blink::WebCrypto* BlinkPlatformImpl::crypto() {
1017   return &web_crypto_;
1018 }
1019
1020
1021 WebThemeEngine* BlinkPlatformImpl::themeEngine() {
1022   return &native_theme_engine_;
1023 }
1024
1025 WebFallbackThemeEngine* BlinkPlatformImpl::fallbackThemeEngine() {
1026   return &fallback_theme_engine_;
1027 }
1028
1029 blink::Platform::FileHandle BlinkPlatformImpl::databaseOpenFile(
1030     const blink::WebString& vfs_file_name, int desired_flags) {
1031 #if defined(OS_WIN)
1032   return INVALID_HANDLE_VALUE;
1033 #elif defined(OS_POSIX)
1034   return -1;
1035 #endif
1036 }
1037
1038 int BlinkPlatformImpl::databaseDeleteFile(
1039     const blink::WebString& vfs_file_name, bool sync_dir) {
1040   return -1;
1041 }
1042
1043 long BlinkPlatformImpl::databaseGetFileAttributes(
1044     const blink::WebString& vfs_file_name) {
1045   return 0;
1046 }
1047
1048 long long BlinkPlatformImpl::databaseGetFileSize(
1049     const blink::WebString& vfs_file_name) {
1050   return 0;
1051 }
1052
1053 long long BlinkPlatformImpl::databaseGetSpaceAvailableForOrigin(
1054     const blink::WebString& origin_identifier) {
1055   return 0;
1056 }
1057
1058 blink::WebString BlinkPlatformImpl::signedPublicKeyAndChallengeString(
1059     unsigned key_size_index,
1060     const blink::WebString& challenge,
1061     const blink::WebURL& url) {
1062   return blink::WebString("");
1063 }
1064
1065 static scoped_ptr<base::ProcessMetrics> CurrentProcessMetrics() {
1066   using base::ProcessMetrics;
1067 #if defined(OS_MACOSX)
1068   return scoped_ptr<ProcessMetrics>(
1069       // The default port provider is sufficient to get data for the current
1070       // process.
1071       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
1072                                            NULL));
1073 #else
1074   return scoped_ptr<ProcessMetrics>(
1075       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle()));
1076 #endif
1077 }
1078
1079 static size_t getMemoryUsageMB(bool bypass_cache) {
1080   size_t current_mem_usage = 0;
1081   MemoryUsageCache* mem_usage_cache_singleton = MemoryUsageCache::GetInstance();
1082   if (!bypass_cache &&
1083       mem_usage_cache_singleton->IsCachedValueValid(&current_mem_usage))
1084     return current_mem_usage;
1085
1086   current_mem_usage = GetMemoryUsageKB() >> 10;
1087   mem_usage_cache_singleton->SetMemoryValue(current_mem_usage);
1088   return current_mem_usage;
1089 }
1090
1091 size_t BlinkPlatformImpl::memoryUsageMB() {
1092   return getMemoryUsageMB(false);
1093 }
1094
1095 size_t BlinkPlatformImpl::actualMemoryUsageMB() {
1096   return getMemoryUsageMB(true);
1097 }
1098
1099 size_t BlinkPlatformImpl::physicalMemoryMB() {
1100   return static_cast<size_t>(base::SysInfo::AmountOfPhysicalMemoryMB());
1101 }
1102
1103 size_t BlinkPlatformImpl::virtualMemoryLimitMB() {
1104   return static_cast<size_t>(base::SysInfo::AmountOfVirtualMemoryMB());
1105 }
1106
1107 size_t BlinkPlatformImpl::numberOfProcessors() {
1108   return static_cast<size_t>(base::SysInfo::NumberOfProcessors());
1109 }
1110
1111 void BlinkPlatformImpl::startHeapProfiling(
1112   const blink::WebString& prefix) {
1113   // FIXME(morrita): Make this built on windows.
1114 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1115   HeapProfilerStart(prefix.utf8().data());
1116 #endif
1117 }
1118
1119 void BlinkPlatformImpl::stopHeapProfiling() {
1120 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1121   HeapProfilerStop();
1122 #endif
1123 }
1124
1125 void BlinkPlatformImpl::dumpHeapProfiling(
1126   const blink::WebString& reason) {
1127 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1128   HeapProfilerDump(reason.utf8().data());
1129 #endif
1130 }
1131
1132 WebString BlinkPlatformImpl::getHeapProfile() {
1133 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
1134   char* data = GetHeapProfile();
1135   WebString result = WebString::fromUTF8(std::string(data));
1136   free(data);
1137   return result;
1138 #else
1139   return WebString();
1140 #endif
1141 }
1142
1143 bool BlinkPlatformImpl::processMemorySizesInBytes(
1144     size_t* private_bytes,
1145     size_t* shared_bytes) {
1146   return CurrentProcessMetrics()->GetMemoryBytes(private_bytes, shared_bytes);
1147 }
1148
1149 bool BlinkPlatformImpl::memoryAllocatorWasteInBytes(size_t* size) {
1150   return base::allocator::GetAllocatorWasteSize(size);
1151 }
1152
1153 blink::WebDiscardableMemory*
1154 BlinkPlatformImpl::allocateAndLockDiscardableMemory(size_t bytes) {
1155   base::DiscardableMemoryType type =
1156       base::DiscardableMemory::GetPreferredType();
1157   if (type == base::DISCARDABLE_MEMORY_TYPE_EMULATED)
1158     return NULL;
1159   return content::WebDiscardableMemoryImpl::CreateLockedMemory(bytes).release();
1160 }
1161
1162 size_t BlinkPlatformImpl::maxDecodedImageBytes() {
1163 #if defined(OS_ANDROID)
1164   if (base::SysInfo::IsLowEndDevice()) {
1165     // Limit image decoded size to 3M pixels on low end devices.
1166     // 4 is maximum number of bytes per pixel.
1167     return 3 * 1024 * 1024 * 4;
1168   }
1169   // For other devices, limit decoded image size based on the amount of physical
1170   // memory.
1171   // In some cases all physical memory is not accessible by Chromium, as it can
1172   // be reserved for direct use by certain hardware. Thus, we set the limit so
1173   // that 1.6GB of reported physical memory on a 2GB device is enough to set the
1174   // limit at 16M pixels, which is a desirable value since 4K*4K is a relatively
1175   // common texture size.
1176   return base::SysInfo::AmountOfPhysicalMemory() / 25;
1177 #else
1178   return noDecodedImageByteLimit;
1179 #endif
1180 }
1181
1182 void BlinkPlatformImpl::SetFlingCurveParameters(
1183     const std::vector<float>& new_touchpad,
1184     const std::vector<float>& new_touchscreen) {
1185   fling_curve_configuration_->SetCurveParameters(new_touchpad, new_touchscreen);
1186 }
1187
1188 void BlinkPlatformImpl::SuspendSharedTimer() {
1189   ++shared_timer_suspended_;
1190 }
1191
1192 void BlinkPlatformImpl::ResumeSharedTimer() {
1193   DCHECK_GT(shared_timer_suspended_, 0);
1194
1195   // The shared timer may have fired or been adjusted while we were suspended.
1196   if (--shared_timer_suspended_ == 0 &&
1197       (!shared_timer_.IsRunning() ||
1198        shared_timer_fire_time_was_set_while_suspended_)) {
1199     shared_timer_fire_time_was_set_while_suspended_ = false;
1200     setSharedTimerFireInterval(
1201         shared_timer_fire_time_ - monotonicallyIncreasingTime());
1202   }
1203 }
1204
1205 // static
1206 void BlinkPlatformImpl::DestroyCurrentThread(void* thread) {
1207   WebThreadImplForMessageLoop* impl =
1208       static_cast<WebThreadImplForMessageLoop*>(thread);
1209   delete impl;
1210 }
1211
1212 }  // namespace content