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