src/webkit/child/webkitplatformsupport_impl.cc

   1 // Copyright (c) 2012 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 "webkit/child/webkitplatformsupport_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/platform_file.h"
  21 #include "base/process/process_metrics.h"
  22 #include "base/rand_util.h"
  23 #include "base/strings/string_number_conversions.h"
  24 #include "base/strings/string_util.h"
  25 #include "base/strings/utf_string_conversions.h"
  26 #include "base/synchronization/lock.h"
  27 #include "base/sys_info.h"
  28 #include "base/time/time.h"
  29 #include "grit/blink_resources.h"
  30 #include "grit/webkit_resources.h"
  31 #include "grit/webkit_strings.h"
  32 #include "net/base/data_url.h"
  33 #include "net/base/mime_util.h"
  34 #include "net/base/net_errors.h"
  35 #include "third_party/WebKit/public/platform/WebCookie.h"
  36 #include "third_party/WebKit/public/platform/WebData.h"
  37 #include "third_party/WebKit/public/platform/WebDiscardableMemory.h"
  38 #include "third_party/WebKit/public/platform/WebGestureCurve.h"
  39 #include "third_party/WebKit/public/platform/WebPluginListBuilder.h"
  40 #include "third_party/WebKit/public/platform/WebString.h"
  41 #include "third_party/WebKit/public/platform/WebURL.h"
  42 #include "third_party/WebKit/public/platform/WebVector.h"
  43 #include "third_party/WebKit/public/web/WebFrameClient.h"
  44 #include "third_party/WebKit/public/web/WebInputEvent.h"
  45 #include "third_party/WebKit/public/web/WebScreenInfo.h"
  46 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
  47 #include "ui/base/layout.h"
  48 #include "webkit/child/webkit_child_helpers.h"
  49 #include "webkit/child/websocketstreamhandle_impl.h"
  50 #include "webkit/child/weburlloader_impl.h"
  51 #include "webkit/common/user_agent/user_agent.h"
  52 #include "webkit/glue/webkit_glue.h"
  53
  54 #if defined(OS_ANDROID)
  55 #include "base/android/sys_utils.h"
  56 #endif
  57
  58 using WebKit::WebAudioBus;
  59 using WebKit::WebCookie;
  60 using WebKit::WebData;
  61 using WebKit::WebLocalizedString;
  62 using WebKit::WebPluginListBuilder;
  63 using WebKit::WebString;
  64 using WebKit::WebSocketStreamHandle;
  65 using WebKit::WebURL;
  66 using WebKit::WebURLError;
  67 using WebKit::WebURLLoader;
  68 using WebKit::WebVector;
  69
  70 namespace {
  71
  72 // A simple class to cache the memory usage for a given amount of time.
  73 class MemoryUsageCache {
  74  public:
  75   // Retrieves the Singleton.
  76   static MemoryUsageCache* GetInstance() {
  77     return Singleton<MemoryUsageCache>::get();
  78   }
  79
  80   MemoryUsageCache() : memory_value_(0) { Init(); }
  81   ~MemoryUsageCache() {}
  82
  83   void Init() {
  84     const unsigned int kCacheSeconds = 1;
  85     cache_valid_time_ = base::TimeDelta::FromSeconds(kCacheSeconds);
  86   }
  87
  88   // Returns true if the cached value is fresh.
  89   // Returns false if the cached value is stale, or if |cached_value| is NULL.
  90   bool IsCachedValueValid(size_t* cached_value) {
  91     base::AutoLock scoped_lock(lock_);
  92     if (!cached_value)
  93       return false;
  94     if (base::Time::Now() - last_updated_time_ > cache_valid_time_)
  95       return false;
  96     *cached_value = memory_value_;
  97     return true;
  98   };
  99
 100   // Setter for |memory_value_|, refreshes |last_updated_time_|.
 101   void SetMemoryValue(const size_t value) {
 102     base::AutoLock scoped_lock(lock_);
 103     memory_value_ = value;
 104     last_updated_time_ = base::Time::Now();
 105   }
 106
 107  private:
 108   // The cached memory value.
 109   size_t memory_value_;
 110
 111   // How long the cached value should remain valid.
 112   base::TimeDelta cache_valid_time_;
 113
 114   // The last time the cached value was updated.
 115   base::Time last_updated_time_;
 116
 117   base::Lock lock_;
 118 };
 119
 120 }  // anonymous namespace
 121
 122 namespace webkit_glue {
 123
 124 static int ToMessageID(WebLocalizedString::Name name) {
 125   switch (name) {
 126     case WebLocalizedString::AXAMPMFieldText:
 127       return IDS_AX_AM_PM_FIELD_TEXT;
 128     case WebLocalizedString::AXButtonActionVerb:
 129       return IDS_AX_BUTTON_ACTION_VERB;
 130     case WebLocalizedString::AXCheckedCheckBoxActionVerb:
 131       return IDS_AX_CHECKED_CHECK_BOX_ACTION_VERB;
 132     case WebLocalizedString::AXDateTimeFieldEmptyValueText:
 133       return IDS_AX_DATE_TIME_FIELD_EMPTY_VALUE_TEXT;
 134     case WebLocalizedString::AXDayOfMonthFieldText:
 135       return IDS_AX_DAY_OF_MONTH_FIELD_TEXT;
 136     case WebLocalizedString::AXHeadingText:
 137       return IDS_AX_ROLE_HEADING;
 138     case WebLocalizedString::AXHourFieldText:
 139       return IDS_AX_HOUR_FIELD_TEXT;
 140     case WebLocalizedString::AXImageMapText:
 141       return IDS_AX_ROLE_IMAGE_MAP;
 142     case WebLocalizedString::AXLinkActionVerb:
 143       return IDS_AX_LINK_ACTION_VERB;
 144     case WebLocalizedString::AXLinkText:
 145       return IDS_AX_ROLE_LINK;
 146     case WebLocalizedString::AXListMarkerText:
 147       return IDS_AX_ROLE_LIST_MARKER;
 148     case WebLocalizedString::AXMediaDefault:
 149       return IDS_AX_MEDIA_DEFAULT;
 150     case WebLocalizedString::AXMediaAudioElement:
 151       return IDS_AX_MEDIA_AUDIO_ELEMENT;
 152     case WebLocalizedString::AXMediaVideoElement:
 153       return IDS_AX_MEDIA_VIDEO_ELEMENT;
 154     case WebLocalizedString::AXMediaMuteButton:
 155       return IDS_AX_MEDIA_MUTE_BUTTON;
 156     case WebLocalizedString::AXMediaUnMuteButton:
 157       return IDS_AX_MEDIA_UNMUTE_BUTTON;
 158     case WebLocalizedString::AXMediaPlayButton:
 159       return IDS_AX_MEDIA_PLAY_BUTTON;
 160     case WebLocalizedString::AXMediaPauseButton:
 161       return IDS_AX_MEDIA_PAUSE_BUTTON;
 162     case WebLocalizedString::AXMediaSlider:
 163       return IDS_AX_MEDIA_SLIDER;
 164     case WebLocalizedString::AXMediaSliderThumb:
 165       return IDS_AX_MEDIA_SLIDER_THUMB;
 166     case WebLocalizedString::AXMediaRewindButton:
 167       return IDS_AX_MEDIA_REWIND_BUTTON;
 168     case WebLocalizedString::AXMediaReturnToRealTime:
 169       return IDS_AX_MEDIA_RETURN_TO_REALTIME_BUTTON;
 170     case WebLocalizedString::AXMediaCurrentTimeDisplay:
 171       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY;
 172     case WebLocalizedString::AXMediaTimeRemainingDisplay:
 173       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY;
 174     case WebLocalizedString::AXMediaStatusDisplay:
 175       return IDS_AX_MEDIA_STATUS_DISPLAY;
 176     case WebLocalizedString::AXMediaEnterFullscreenButton:
 177       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON;
 178     case WebLocalizedString::AXMediaExitFullscreenButton:
 179       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON;
 180   case WebLocalizedString::AXMediaSeekForwardButton:
 181     return IDS_AX_MEDIA_SEEK_FORWARD_BUTTON;
 182     case WebLocalizedString::AXMediaSeekBackButton:
 183       return IDS_AX_MEDIA_SEEK_BACK_BUTTON;
 184     case WebLocalizedString::AXMediaShowClosedCaptionsButton:
 185       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON;
 186     case WebLocalizedString::AXMediaHideClosedCaptionsButton:
 187       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON;
 188     case WebLocalizedString::AXMediaAudioElementHelp:
 189       return IDS_AX_MEDIA_AUDIO_ELEMENT_HELP;
 190     case WebLocalizedString::AXMediaVideoElementHelp:
 191       return IDS_AX_MEDIA_VIDEO_ELEMENT_HELP;
 192     case WebLocalizedString::AXMediaMuteButtonHelp:
 193       return IDS_AX_MEDIA_MUTE_BUTTON_HELP;
 194     case WebLocalizedString::AXMediaUnMuteButtonHelp:
 195       return IDS_AX_MEDIA_UNMUTE_BUTTON_HELP;
 196     case WebLocalizedString::AXMediaPlayButtonHelp:
 197       return IDS_AX_MEDIA_PLAY_BUTTON_HELP;
 198     case WebLocalizedString::AXMediaPauseButtonHelp:
 199       return IDS_AX_MEDIA_PAUSE_BUTTON_HELP;
 200     case WebLocalizedString::AXMediaSliderHelp:
 201       return IDS_AX_MEDIA_SLIDER_HELP;
 202     case WebLocalizedString::AXMediaSliderThumbHelp:
 203       return IDS_AX_MEDIA_SLIDER_THUMB_HELP;
 204     case WebLocalizedString::AXMediaRewindButtonHelp:
 205       return IDS_AX_MEDIA_REWIND_BUTTON_HELP;
 206     case WebLocalizedString::AXMediaReturnToRealTimeHelp:
 207       return IDS_AX_MEDIA_RETURN_TO_REALTIME_BUTTON_HELP;
 208     case WebLocalizedString::AXMediaCurrentTimeDisplayHelp:
 209       return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY_HELP;
 210     case WebLocalizedString::AXMediaTimeRemainingDisplayHelp:
 211       return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY_HELP;
 212     case WebLocalizedString::AXMediaStatusDisplayHelp:
 213       return IDS_AX_MEDIA_STATUS_DISPLAY_HELP;
 214     case WebLocalizedString::AXMediaEnterFullscreenButtonHelp:
 215       return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON_HELP;
 216     case WebLocalizedString::AXMediaExitFullscreenButtonHelp:
 217       return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON_HELP;
 218   case WebLocalizedString::AXMediaSeekForwardButtonHelp:
 219     return IDS_AX_MEDIA_SEEK_FORWARD_BUTTON_HELP;
 220     case WebLocalizedString::AXMediaSeekBackButtonHelp:
 221       return IDS_AX_MEDIA_SEEK_BACK_BUTTON_HELP;
 222     case WebLocalizedString::AXMediaShowClosedCaptionsButtonHelp:
 223       return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON_HELP;
 224     case WebLocalizedString::AXMediaHideClosedCaptionsButtonHelp:
 225       return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON_HELP;
 226     case WebLocalizedString::AXMillisecondFieldText:
 227       return IDS_AX_MILLISECOND_FIELD_TEXT;
 228     case WebLocalizedString::AXMinuteFieldText:
 229       return IDS_AX_MINUTE_FIELD_TEXT;
 230     case WebLocalizedString::AXMonthFieldText:
 231       return IDS_AX_MONTH_FIELD_TEXT;
 232     case WebLocalizedString::AXRadioButtonActionVerb:
 233       return IDS_AX_RADIO_BUTTON_ACTION_VERB;
 234     case WebLocalizedString::AXSecondFieldText:
 235       return IDS_AX_SECOND_FIELD_TEXT;
 236     case WebLocalizedString::AXTextFieldActionVerb:
 237       return IDS_AX_TEXT_FIELD_ACTION_VERB;
 238     case WebLocalizedString::AXUncheckedCheckBoxActionVerb:
 239       return IDS_AX_UNCHECKED_CHECK_BOX_ACTION_VERB;
 240     case WebLocalizedString::AXWebAreaText:
 241       return IDS_AX_ROLE_WEB_AREA;
 242     case WebLocalizedString::AXWeekOfYearFieldText:
 243       return IDS_AX_WEEK_OF_YEAR_FIELD_TEXT;
 244     case WebLocalizedString::AXYearFieldText:
 245       return IDS_AX_YEAR_FIELD_TEXT;
 246     case WebLocalizedString::CalendarClear:
 247       return IDS_FORM_CALENDAR_CLEAR;
 248     case WebLocalizedString::CalendarToday:
 249       return IDS_FORM_CALENDAR_TODAY;
 250     case WebLocalizedString::DateFormatDayInMonthLabel:
 251       return IDS_FORM_DATE_FORMAT_DAY_IN_MONTH;
 252     case WebLocalizedString::DateFormatMonthLabel:
 253       return IDS_FORM_DATE_FORMAT_MONTH;
 254     case WebLocalizedString::DateFormatYearLabel:
 255       return IDS_FORM_DATE_FORMAT_YEAR;
 256     case WebLocalizedString::DetailsLabel:
 257       return IDS_DETAILS_WITHOUT_SUMMARY_LABEL;
 258     case WebLocalizedString::FileButtonChooseFileLabel:
 259       return IDS_FORM_FILE_BUTTON_LABEL;
 260     case WebLocalizedString::FileButtonChooseMultipleFilesLabel:
 261       return IDS_FORM_MULTIPLE_FILES_BUTTON_LABEL;
 262     case WebLocalizedString::FileButtonNoFileSelectedLabel:
 263       return IDS_FORM_FILE_NO_FILE_LABEL;
 264     case WebLocalizedString::InputElementAltText:
 265       return IDS_FORM_INPUT_ALT;
 266     case WebLocalizedString::KeygenMenuHighGradeKeySize:
 267       return IDS_KEYGEN_HIGH_GRADE_KEY;
 268     case WebLocalizedString::KeygenMenuMediumGradeKeySize:
 269       return IDS_KEYGEN_MED_GRADE_KEY;
 270     case WebLocalizedString::MissingPluginText:
 271       return IDS_PLUGIN_INITIALIZATION_ERROR;
 272     case WebLocalizedString::MultipleFileUploadText:
 273       return IDS_FORM_FILE_MULTIPLE_UPLOAD;
 274     case WebLocalizedString::OtherColorLabel:
 275       return IDS_FORM_OTHER_COLOR_LABEL;
 276     case WebLocalizedString::OtherDateLabel:
 277         return IDS_FORM_OTHER_DATE_LABEL;
 278     case WebLocalizedString::OtherMonthLabel:
 279       return IDS_FORM_OTHER_MONTH_LABEL;
 280     case WebLocalizedString::OtherTimeLabel:
 281       return IDS_FORM_OTHER_TIME_LABEL;
 282     case WebLocalizedString::OtherWeekLabel:
 283       return IDS_FORM_OTHER_WEEK_LABEL;
 284     case WebLocalizedString::PlaceholderForDayOfMonthField:
 285       return IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD;
 286     case WebLocalizedString::PlaceholderForMonthField:
 287       return IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD;
 288     case WebLocalizedString::PlaceholderForYearField:
 289       return IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD;
 290     case WebLocalizedString::ResetButtonDefaultLabel:
 291       return IDS_FORM_RESET_LABEL;
 292     case WebLocalizedString::SearchableIndexIntroduction:
 293       return IDS_SEARCHABLE_INDEX_INTRO;
 294     case WebLocalizedString::SearchMenuClearRecentSearchesText:
 295       return IDS_RECENT_SEARCHES_CLEAR;
 296     case WebLocalizedString::SearchMenuNoRecentSearchesText:
 297       return IDS_RECENT_SEARCHES_NONE;
 298     case WebLocalizedString::SearchMenuRecentSearchesText:
 299       return IDS_RECENT_SEARCHES;
 300     case WebLocalizedString::SubmitButtonDefaultLabel:
 301       return IDS_FORM_SUBMIT_LABEL;
 302     case WebLocalizedString::ThisMonthButtonLabel:
 303       return IDS_FORM_THIS_MONTH_LABEL;
 304     case WebLocalizedString::ThisWeekButtonLabel:
 305       return IDS_FORM_THIS_WEEK_LABEL;
 306     case WebLocalizedString::ValidationBadInputForDateTime:
 307       return IDS_FORM_VALIDATION_BAD_INPUT_DATETIME;
 308     case WebLocalizedString::ValidationBadInputForNumber:
 309       return IDS_FORM_VALIDATION_BAD_INPUT_NUMBER;
 310     case WebLocalizedString::ValidationPatternMismatch:
 311       return IDS_FORM_VALIDATION_PATTERN_MISMATCH;
 312     case WebLocalizedString::ValidationRangeOverflow:
 313       return IDS_FORM_VALIDATION_RANGE_OVERFLOW;
 314     case WebLocalizedString::ValidationRangeOverflowDateTime:
 315       return IDS_FORM_VALIDATION_RANGE_OVERFLOW_DATETIME;
 316     case WebLocalizedString::ValidationRangeUnderflow:
 317       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW;
 318     case WebLocalizedString::ValidationRangeUnderflowDateTime:
 319       return IDS_FORM_VALIDATION_RANGE_UNDERFLOW_DATETIME;
 320     case WebLocalizedString::ValidationStepMismatch:
 321       return IDS_FORM_VALIDATION_STEP_MISMATCH;
 322     case WebLocalizedString::ValidationStepMismatchCloseToLimit:
 323       return IDS_FORM_VALIDATION_STEP_MISMATCH_CLOSE_TO_LIMIT;
 324     case WebLocalizedString::ValidationTooLong:
 325       return IDS_FORM_VALIDATION_TOO_LONG;
 326     case WebLocalizedString::ValidationTypeMismatch:
 327       return IDS_FORM_VALIDATION_TYPE_MISMATCH;
 328     case WebLocalizedString::ValidationTypeMismatchForEmail:
 329       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL;
 330     case WebLocalizedString::ValidationTypeMismatchForEmailEmpty:
 331       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY;
 332     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain:
 333       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_DOMAIN;
 334     case WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal:
 335       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_LOCAL;
 336     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain:
 337       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOMAIN;
 338     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots:
 339       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOTS;
 340     case WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal:
 341       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_LOCAL;
 342     case WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign:
 343       return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_NO_AT_SIGN;
 344     case WebLocalizedString::ValidationTypeMismatchForMultipleEmail:
 345       return IDS_FORM_VALIDATION_TYPE_MISMATCH_MULTIPLE_EMAIL;
 346     case WebLocalizedString::ValidationTypeMismatchForURL:
 347       return IDS_FORM_VALIDATION_TYPE_MISMATCH_URL;
 348     case WebLocalizedString::ValidationValueMissing:
 349       return IDS_FORM_VALIDATION_VALUE_MISSING;
 350     case WebLocalizedString::ValidationValueMissingForCheckbox:
 351       return IDS_FORM_VALIDATION_VALUE_MISSING_CHECKBOX;
 352     case WebLocalizedString::ValidationValueMissingForFile:
 353       return IDS_FORM_VALIDATION_VALUE_MISSING_FILE;
 354     case WebLocalizedString::ValidationValueMissingForMultipleFile:
 355       return IDS_FORM_VALIDATION_VALUE_MISSING_MULTIPLE_FILE;
 356     case WebLocalizedString::ValidationValueMissingForRadio:
 357       return IDS_FORM_VALIDATION_VALUE_MISSING_RADIO;
 358     case WebLocalizedString::ValidationValueMissingForSelect:
 359       return IDS_FORM_VALIDATION_VALUE_MISSING_SELECT;
 360     case WebLocalizedString::WeekFormatTemplate:
 361       return IDS_FORM_INPUT_WEEK_TEMPLATE;
 362     case WebLocalizedString::WeekNumberLabel:
 363       return IDS_FORM_WEEK_NUMBER_LABEL;
 364     // This "default:" line exists to avoid compile warnings about enum
 365     // coverage when we add a new symbol to WebLocalizedString.h in WebKit.
 366     // After a planned WebKit patch is landed, we need to add a case statement
 367     // for the added symbol here.
 368     default:
 369       break;
 370   }
 371   return -1;
 372 }
 373
 374 WebKitPlatformSupportImpl::WebKitPlatformSupportImpl()
 375     : main_loop_(base::MessageLoop::current()),
 376       shared_timer_func_(NULL),
 377       shared_timer_fire_time_(0.0),
 378       shared_timer_fire_time_was_set_while_suspended_(false),
 379       shared_timer_suspended_(0) {}
 380
 381 WebKitPlatformSupportImpl::~WebKitPlatformSupportImpl() {
 382 }
 383
 384 WebURLLoader* WebKitPlatformSupportImpl::createURLLoader() {
 385   return new WebURLLoaderImpl(this);
 386 }
 387
 388 WebSocketStreamHandle* WebKitPlatformSupportImpl::createSocketStreamHandle() {
 389   return new WebSocketStreamHandleImpl(this);
 390 }
 391
 392 WebString WebKitPlatformSupportImpl::userAgent(const WebURL& url) {
 393   return WebString::fromUTF8(webkit_glue::GetUserAgent(url));
 394 }
 395
 396 WebData WebKitPlatformSupportImpl::parseDataURL(
 397     const WebURL& url,
 398     WebString& mimetype_out,
 399     WebString& charset_out) {
 400   std::string mime_type, char_set, data;
 401   if (net::DataURL::Parse(url, &mime_type, &char_set, &data)
 402       && net::IsSupportedMimeType(mime_type)) {
 403     mimetype_out = WebString::fromUTF8(mime_type);
 404     charset_out = WebString::fromUTF8(char_set);
 405     return data;
 406   }
 407   return WebData();
 408 }
 409
 410 WebURLError WebKitPlatformSupportImpl::cancelledError(
 411     const WebURL& unreachableURL) const {
 412   return WebURLLoaderImpl::CreateError(unreachableURL, net::ERR_ABORTED);
 413 }
 414
 415 void WebKitPlatformSupportImpl::decrementStatsCounter(const char* name) {
 416   base::StatsCounter(name).Decrement();
 417 }
 418
 419 void WebKitPlatformSupportImpl::incrementStatsCounter(const char* name) {
 420   base::StatsCounter(name).Increment();
 421 }
 422
 423 void WebKitPlatformSupportImpl::histogramCustomCounts(
 424     const char* name, int sample, int min, int max, int bucket_count) {
 425   // Copied from histogram macro, but without the static variable caching
 426   // the histogram because name is dynamic.
 427   base::HistogramBase* counter =
 428       base::Histogram::FactoryGet(name, min, max, bucket_count,
 429           base::HistogramBase::kUmaTargetedHistogramFlag);
 430   DCHECK_EQ(name, counter->histogram_name());
 431   counter->Add(sample);
 432 }
 433
 434 void WebKitPlatformSupportImpl::histogramEnumeration(
 435     const char* name, int sample, int boundary_value) {
 436   // Copied from histogram macro, but without the static variable caching
 437   // the histogram because name is dynamic.
 438   base::HistogramBase* counter =
 439       base::LinearHistogram::FactoryGet(name, 1, boundary_value,
 440           boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag);
 441   DCHECK_EQ(name, counter->histogram_name());
 442   counter->Add(sample);
 443 }
 444
 445 void WebKitPlatformSupportImpl::histogramSparse(const char* name, int sample) {
 446   // For sparse histograms, we can use the macro, as it does not incorporate a
 447   // static.
 448   UMA_HISTOGRAM_SPARSE_SLOWLY(name, sample);
 449 }
 450
 451 const unsigned char* WebKitPlatformSupportImpl::getTraceCategoryEnabledFlag(
 452     const char* category_group) {
 453   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 454 }
 455
 456 long* WebKitPlatformSupportImpl::getTraceSamplingState(
 457     const unsigned thread_bucket) {
 458   switch (thread_bucket) {
 459     case 0:
 460       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(0));
 461     case 1:
 462       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(1));
 463     case 2:
 464       return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(2));
 465     default:
 466       NOTREACHED() << "Unknown thread bucket type.";
 467   }
 468   return NULL;
 469 }
 470
 471 COMPILE_ASSERT(
 472     sizeof(WebKit::Platform::TraceEventHandle) ==
 473         sizeof(base::debug::TraceEventHandle),
 474     TraceEventHandle_types_must_be_same_size);
 475
 476 WebKit::Platform::TraceEventHandle WebKitPlatformSupportImpl::addTraceEvent(
 477     char phase,
 478     const unsigned char* category_group_enabled,
 479     const char* name,
 480     unsigned long long id,
 481     int num_args,
 482     const char** arg_names,
 483     const unsigned char* arg_types,
 484     const unsigned long long* arg_values,
 485     unsigned char flags) {
 486   base::debug::TraceEventHandle handle = TRACE_EVENT_API_ADD_TRACE_EVENT(
 487       phase, category_group_enabled, name, id,
 488       num_args, arg_names, arg_types, arg_values, NULL, flags);
 489   WebKit::Platform::TraceEventHandle result;
 490   memcpy(&result, &handle, sizeof(result));
 491   return result;
 492 }
 493
 494 void WebKitPlatformSupportImpl::updateTraceEventDuration(
 495     TraceEventHandle handle) {
 496   base::debug::TraceEventHandle traceEventHandle;
 497   memcpy(&traceEventHandle, &handle, sizeof(handle));
 498   TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(traceEventHandle);
 499 }
 500
 501 namespace {
 502
 503 WebData loadAudioSpatializationResource(WebKitPlatformSupportImpl* platform,
 504                                         const char* name) {
 505 #ifdef IDR_AUDIO_SPATIALIZATION_COMPOSITE
 506   if (!strcmp(name, "Composite")) {
 507     base::StringPiece resource =
 508         platform->GetDataResource(IDR_AUDIO_SPATIALIZATION_COMPOSITE,
 509                                   ui::SCALE_FACTOR_NONE);
 510     return WebData(resource.data(), resource.size());
 511   }
 512 #endif
 513
 514 #ifdef IDR_AUDIO_SPATIALIZATION_T000_P000
 515   const size_t kExpectedSpatializationNameLength = 31;
 516   if (strlen(name) != kExpectedSpatializationNameLength) {
 517     return WebData();
 518   }
 519
 520   // Extract the azimuth and elevation from the resource name.
 521   int azimuth = 0;
 522   int elevation = 0;
 523   int values_parsed =
 524       sscanf(name, "IRC_Composite_C_R0195_T%3d_P%3d", &azimuth, &elevation);
 525   if (values_parsed != 2) {
 526     return WebData();
 527   }
 528
 529   // The resource index values go through the elevations first, then azimuths.
 530   const int kAngleSpacing = 15;
 531
 532   // 0 <= elevation <= 90 (or 315 <= elevation <= 345)
 533   // in increments of 15 degrees.
 534   int elevation_index =
 535       elevation <= 90 ? elevation / kAngleSpacing :
 536       7 + (elevation - 315) / kAngleSpacing;
 537   bool is_elevation_index_good = 0 <= elevation_index && elevation_index < 10;
 538
 539   // 0 <= azimuth < 360 in increments of 15 degrees.
 540   int azimuth_index = azimuth / kAngleSpacing;
 541   bool is_azimuth_index_good = 0 <= azimuth_index && azimuth_index < 24;
 542
 543   const int kNumberOfElevations = 10;
 544   const int kNumberOfAudioResources = 240;
 545   int resource_index = kNumberOfElevations * azimuth_index + elevation_index;
 546   bool is_resource_index_good = 0 <= resource_index &&
 547       resource_index < kNumberOfAudioResources;
 548
 549   if (is_azimuth_index_good && is_elevation_index_good &&
 550       is_resource_index_good) {
 551     const int kFirstAudioResourceIndex = IDR_AUDIO_SPATIALIZATION_T000_P000;
 552     base::StringPiece resource =
 553         platform->GetDataResource(kFirstAudioResourceIndex + resource_index,
 554                                   ui::SCALE_FACTOR_NONE);
 555     return WebData(resource.data(), resource.size());
 556   }
 557 #endif  // IDR_AUDIO_SPATIALIZATION_T000_P000
 558
 559   NOTREACHED();
 560   return WebData();
 561 }
 562
 563 struct DataResource {
 564   const char* name;
 565   int id;
 566   ui::ScaleFactor scale_factor;
 567 };
 568
 569 const DataResource kDataResources[] = {
 570   { "missingImage", IDR_BROKENIMAGE, ui::SCALE_FACTOR_100P },
 571   { "missingImage@2x", IDR_BROKENIMAGE, ui::SCALE_FACTOR_200P },
 572   { "mediaplayerPause", IDR_MEDIAPLAYER_PAUSE_BUTTON, ui::SCALE_FACTOR_100P },
 573   { "mediaplayerPauseHover",
 574     IDR_MEDIAPLAYER_PAUSE_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 575   { "mediaplayerPauseDown",
 576     IDR_MEDIAPLAYER_PAUSE_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 577   { "mediaplayerPlay", IDR_MEDIAPLAYER_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 578   { "mediaplayerPlayHover",
 579     IDR_MEDIAPLAYER_PLAY_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 580   { "mediaplayerPlayDown",
 581     IDR_MEDIAPLAYER_PLAY_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 582   { "mediaplayerPlayDisabled",
 583     IDR_MEDIAPLAYER_PLAY_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 584   { "mediaplayerSoundLevel3",
 585     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON, ui::SCALE_FACTOR_100P },
 586   { "mediaplayerSoundLevel3Hover",
 587     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 588   { "mediaplayerSoundLevel3Down",
 589     IDR_MEDIAPLAYER_SOUND_LEVEL3_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 590   { "mediaplayerSoundLevel2",
 591     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON, ui::SCALE_FACTOR_100P },
 592   { "mediaplayerSoundLevel2Hover",
 593     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 594   { "mediaplayerSoundLevel2Down",
 595     IDR_MEDIAPLAYER_SOUND_LEVEL2_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 596   { "mediaplayerSoundLevel1",
 597     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON, ui::SCALE_FACTOR_100P },
 598   { "mediaplayerSoundLevel1Hover",
 599     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 600   { "mediaplayerSoundLevel1Down",
 601     IDR_MEDIAPLAYER_SOUND_LEVEL1_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 602   { "mediaplayerSoundLevel0",
 603     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON, ui::SCALE_FACTOR_100P },
 604   { "mediaplayerSoundLevel0Hover",
 605     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 606   { "mediaplayerSoundLevel0Down",
 607     IDR_MEDIAPLAYER_SOUND_LEVEL0_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 608   { "mediaplayerSoundDisabled",
 609     IDR_MEDIAPLAYER_SOUND_DISABLED, ui::SCALE_FACTOR_100P },
 610   { "mediaplayerSliderThumb",
 611     IDR_MEDIAPLAYER_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 612   { "mediaplayerSliderThumbHover",
 613     IDR_MEDIAPLAYER_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 614   { "mediaplayerSliderThumbDown",
 615     IDR_MEDIAPLAYER_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 616   { "mediaplayerVolumeSliderThumb",
 617     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB, ui::SCALE_FACTOR_100P },
 618   { "mediaplayerVolumeSliderThumbHover",
 619     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_HOVER, ui::SCALE_FACTOR_100P },
 620   { "mediaplayerVolumeSliderThumbDown",
 621     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DOWN, ui::SCALE_FACTOR_100P },
 622   { "mediaplayerVolumeSliderThumbDisabled",
 623     IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB_DISABLED, ui::SCALE_FACTOR_100P },
 624   { "mediaplayerClosedCaption",
 625     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON, ui::SCALE_FACTOR_100P },
 626   { "mediaplayerClosedCaptionHover",
 627     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 628   { "mediaplayerClosedCaptionDown",
 629     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 630   { "mediaplayerClosedCaptionDisabled",
 631     IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 632   { "mediaplayerFullscreen",
 633     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON, ui::SCALE_FACTOR_100P },
 634   { "mediaplayerFullscreenHover",
 635     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_HOVER, ui::SCALE_FACTOR_100P },
 636   { "mediaplayerFullscreenDown",
 637     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DOWN, ui::SCALE_FACTOR_100P },
 638   { "mediaplayerFullscreenDisabled",
 639     IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DISABLED, ui::SCALE_FACTOR_100P },
 640 #if defined(OS_ANDROID)
 641   { "mediaplayerOverlayPlay",
 642     IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON, ui::SCALE_FACTOR_100P },
 643 #endif
 644 #if defined(OS_MACOSX)
 645   { "overhangPattern", IDR_OVERHANG_PATTERN, ui::SCALE_FACTOR_100P },
 646   { "overhangShadow", IDR_OVERHANG_SHADOW, ui::SCALE_FACTOR_100P },
 647 #endif
 648   { "panIcon", IDR_PAN_SCROLL_ICON, ui::SCALE_FACTOR_100P },
 649   { "searchCancel", IDR_SEARCH_CANCEL, ui::SCALE_FACTOR_100P },
 650   { "searchCancelPressed", IDR_SEARCH_CANCEL_PRESSED, ui::SCALE_FACTOR_100P },
 651   { "searchMagnifier", IDR_SEARCH_MAGNIFIER, ui::SCALE_FACTOR_100P },
 652   { "searchMagnifierResults",
 653     IDR_SEARCH_MAGNIFIER_RESULTS, ui::SCALE_FACTOR_100P },
 654   { "textAreaResizeCorner", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_100P },
 655   { "textAreaResizeCorner@2x", IDR_TEXTAREA_RESIZER, ui::SCALE_FACTOR_200P },
 656   { "inputSpeech", IDR_INPUT_SPEECH, ui::SCALE_FACTOR_100P },
 657   { "inputSpeechRecording", IDR_INPUT_SPEECH_RECORDING, ui::SCALE_FACTOR_100P },
 658   { "inputSpeechWaiting", IDR_INPUT_SPEECH_WAITING, ui::SCALE_FACTOR_100P },
 659   { "americanExpressCC", IDR_AUTOFILL_CC_AMEX, ui::SCALE_FACTOR_100P },
 660   { "dinersCC", IDR_AUTOFILL_CC_DINERS, ui::SCALE_FACTOR_100P },
 661   { "discoverCC", IDR_AUTOFILL_CC_DISCOVER, ui::SCALE_FACTOR_100P },
 662   { "genericCC", IDR_AUTOFILL_CC_GENERIC, ui::SCALE_FACTOR_100P },
 663   { "jcbCC", IDR_AUTOFILL_CC_JCB, ui::SCALE_FACTOR_100P },
 664   { "masterCardCC", IDR_AUTOFILL_CC_MASTERCARD, ui::SCALE_FACTOR_100P },
 665   { "visaCC", IDR_AUTOFILL_CC_VISA, ui::SCALE_FACTOR_100P },
 666   { "generatePassword", IDR_PASSWORD_GENERATION_ICON, ui::SCALE_FACTOR_100P },
 667   { "generatePasswordHover",
 668     IDR_PASSWORD_GENERATION_ICON_HOVER, ui::SCALE_FACTOR_100P },
 669   { "syntheticTouchCursor",
 670     IDR_SYNTHETIC_TOUCH_CURSOR, ui::SCALE_FACTOR_100P },
 671 };
 672
 673 }  // namespace
 674
 675 WebData WebKitPlatformSupportImpl::loadResource(const char* name) {
 676   // Some clients will call into this method with an empty |name| when they have
 677   // optional resources.  For example, the PopupMenuChromium code can have icons
 678   // for some Autofill items but not for others.
 679   if (!strlen(name))
 680     return WebData();
 681
 682   // Check the name prefix to see if it's an audio resource.
 683   if (StartsWithASCII(name, "IRC_Composite", true) ||
 684       StartsWithASCII(name, "Composite", true))
 685     return loadAudioSpatializationResource(this, name);
 686
 687   // TODO(flackr): We should use a better than linear search here, a trie would
 688   // be ideal.
 689   for (size_t i = 0; i < arraysize(kDataResources); ++i) {
 690     if (!strcmp(name, kDataResources[i].name)) {
 691       base::StringPiece resource =
 692           GetDataResource(kDataResources[i].id,
 693                           kDataResources[i].scale_factor);
 694       return WebData(resource.data(), resource.size());
 695     }
 696   }
 697
 698   NOTREACHED() << "Unknown image resource " << name;
 699   return WebData();
 700 }
 701
 702 WebString WebKitPlatformSupportImpl::queryLocalizedString(
 703     WebLocalizedString::Name name) {
 704   int message_id = ToMessageID(name);
 705   if (message_id < 0)
 706     return WebString();
 707   return GetLocalizedString(message_id);
 708 }
 709
 710 WebString WebKitPlatformSupportImpl::queryLocalizedString(
 711     WebLocalizedString::Name name, int numeric_value) {
 712   return queryLocalizedString(name, base::IntToString16(numeric_value));
 713 }
 714
 715 WebString WebKitPlatformSupportImpl::queryLocalizedString(
 716     WebLocalizedString::Name name, const WebString& value) {
 717   int message_id = ToMessageID(name);
 718   if (message_id < 0)
 719     return WebString();
 720   return ReplaceStringPlaceholders(GetLocalizedString(message_id), value, NULL);
 721 }
 722
 723 WebString WebKitPlatformSupportImpl::queryLocalizedString(
 724     WebLocalizedString::Name name,
 725     const WebString& value1,
 726     const WebString& value2) {
 727   int message_id = ToMessageID(name);
 728   if (message_id < 0)
 729     return WebString();
 730   std::vector<base::string16> values;
 731   values.reserve(2);
 732   values.push_back(value1);
 733   values.push_back(value2);
 734   return ReplaceStringPlaceholders(
 735       GetLocalizedString(message_id), values, NULL);
 736 }
 737
 738 double WebKitPlatformSupportImpl::currentTime() {
 739   return base::Time::Now().ToDoubleT();
 740 }
 741
 742 double WebKitPlatformSupportImpl::monotonicallyIncreasingTime() {
 743   return base::TimeTicks::Now().ToInternalValue() /
 744       static_cast<double>(base::Time::kMicrosecondsPerSecond);
 745 }
 746
 747 void WebKitPlatformSupportImpl::cryptographicallyRandomValues(
 748     unsigned char* buffer, size_t length) {
 749   base::RandBytes(buffer, length);
 750 }
 751
 752 void WebKitPlatformSupportImpl::setSharedTimerFiredFunction(void (*func)()) {
 753   shared_timer_func_ = func;
 754 }
 755
 756 void WebKitPlatformSupportImpl::setSharedTimerFireInterval(
 757     double interval_seconds) {
 758   shared_timer_fire_time_ = interval_seconds + monotonicallyIncreasingTime();
 759   if (shared_timer_suspended_) {
 760     shared_timer_fire_time_was_set_while_suspended_ = true;
 761     return;
 762   }
 763
 764   // By converting between double and int64 representation, we run the risk
 765   // of losing precision due to rounding errors. Performing computations in
 766   // microseconds reduces this risk somewhat. But there still is the potential
 767   // of us computing a fire time for the timer that is shorter than what we
 768   // need.
 769   // As the event loop will check event deadlines prior to actually firing
 770   // them, there is a risk of needlessly rescheduling events and of
 771   // needlessly looping if sleep times are too short even by small amounts.
 772   // This results in measurable performance degradation unless we use ceil() to
 773   // always round up the sleep times.
 774   int64 interval = static_cast<int64>(
 775       ceil(interval_seconds * base::Time::kMillisecondsPerSecond)
 776       * base::Time::kMicrosecondsPerMillisecond);
 777
 778   if (interval < 0)
 779     interval = 0;
 780
 781   shared_timer_.Stop();
 782   shared_timer_.Start(FROM_HERE, base::TimeDelta::FromMicroseconds(interval),
 783                       this, &WebKitPlatformSupportImpl::DoTimeout);
 784   OnStartSharedTimer(base::TimeDelta::FromMicroseconds(interval));
 785 }
 786
 787 void WebKitPlatformSupportImpl::stopSharedTimer() {
 788   shared_timer_.Stop();
 789 }
 790
 791 void WebKitPlatformSupportImpl::callOnMainThread(
 792     void (*func)(void*), void* context) {
 793   main_loop_->PostTask(FROM_HERE, base::Bind(func, context));
 794 }
 795
 796 base::PlatformFile WebKitPlatformSupportImpl::databaseOpenFile(
 797     const WebKit::WebString& vfs_file_name, int desired_flags) {
 798   return base::kInvalidPlatformFileValue;
 799 }
 800
 801 int WebKitPlatformSupportImpl::databaseDeleteFile(
 802     const WebKit::WebString& vfs_file_name, bool sync_dir) {
 803   return -1;
 804 }
 805
 806 long WebKitPlatformSupportImpl::databaseGetFileAttributes(
 807     const WebKit::WebString& vfs_file_name) {
 808   return 0;
 809 }
 810
 811 long long WebKitPlatformSupportImpl::databaseGetFileSize(
 812     const WebKit::WebString& vfs_file_name) {
 813   return 0;
 814 }
 815
 816 long long WebKitPlatformSupportImpl::databaseGetSpaceAvailableForOrigin(
 817     const WebKit::WebString& origin_identifier) {
 818   return 0;
 819 }
 820
 821 WebKit::WebString WebKitPlatformSupportImpl::signedPublicKeyAndChallengeString(
 822     unsigned key_size_index,
 823     const WebKit::WebString& challenge,
 824     const WebKit::WebURL& url) {
 825   return WebKit::WebString("");
 826 }
 827
 828 static scoped_ptr<base::ProcessMetrics> CurrentProcessMetrics() {
 829   using base::ProcessMetrics;
 830 #if defined(OS_MACOSX)
 831   return scoped_ptr<ProcessMetrics>(
 832       // The default port provider is sufficient to get data for the current
 833       // process.
 834       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
 835                                            NULL));
 836 #else
 837   return scoped_ptr<ProcessMetrics>(
 838       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle()));
 839 #endif
 840 }
 841
 842 static size_t getMemoryUsageMB(bool bypass_cache) {
 843   size_t current_mem_usage = 0;
 844   MemoryUsageCache* mem_usage_cache_singleton = MemoryUsageCache::GetInstance();
 845   if (!bypass_cache &&
 846       mem_usage_cache_singleton->IsCachedValueValid(&current_mem_usage))
 847     return current_mem_usage;
 848
 849   current_mem_usage = MemoryUsageKB() >> 10;
 850   mem_usage_cache_singleton->SetMemoryValue(current_mem_usage);
 851   return current_mem_usage;
 852 }
 853
 854 size_t WebKitPlatformSupportImpl::memoryUsageMB() {
 855   return getMemoryUsageMB(false);
 856 }
 857
 858 size_t WebKitPlatformSupportImpl::actualMemoryUsageMB() {
 859   return getMemoryUsageMB(true);
 860 }
 861
 862 void WebKitPlatformSupportImpl::startHeapProfiling(
 863   const WebKit::WebString& prefix) {
 864   // FIXME(morrita): Make this built on windows.
 865 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
 866   HeapProfilerStart(prefix.utf8().data());
 867 #endif
 868 }
 869
 870 void WebKitPlatformSupportImpl::stopHeapProfiling() {
 871 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
 872   HeapProfilerStop();
 873 #endif
 874 }
 875
 876 void WebKitPlatformSupportImpl::dumpHeapProfiling(
 877   const WebKit::WebString& reason) {
 878 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
 879   HeapProfilerDump(reason.utf8().data());
 880 #endif
 881 }
 882
 883 WebString WebKitPlatformSupportImpl::getHeapProfile() {
 884 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
 885   char* data = GetHeapProfile();
 886   WebString result = WebString::fromUTF8(std::string(data));
 887   free(data);
 888   return result;
 889 #else
 890   return WebString();
 891 #endif
 892 }
 893
 894 bool WebKitPlatformSupportImpl::processMemorySizesInBytes(
 895     size_t* private_bytes,
 896     size_t* shared_bytes) {
 897   return CurrentProcessMetrics()->GetMemoryBytes(private_bytes, shared_bytes);
 898 }
 899
 900 bool WebKitPlatformSupportImpl::memoryAllocatorWasteInBytes(size_t* size) {
 901   return base::allocator::GetAllocatorWasteSize(size);
 902 }
 903
 904 size_t WebKitPlatformSupportImpl::maxDecodedImageBytes() {
 905 #if defined(OS_ANDROID)
 906   if (base::android::SysUtils::IsLowEndDevice()) {
 907     // Limit image decoded size to 3M pixels on low end devices.
 908     // 4 is maximum number of bytes per pixel.
 909     return 3 * 1024 * 1024 * 4;
 910   }
 911   // For other devices, limit decoded image size based on the amount of physical
 912   // memory. For a device with 2GB physical memory the limit is 16M pixels.
 913   return base::SysInfo::AmountOfPhysicalMemory() / 32;
 914 #else
 915   return noDecodedImageByteLimit;
 916 #endif
 917 }
 918
 919 void WebKitPlatformSupportImpl::SuspendSharedTimer() {
 920   ++shared_timer_suspended_;
 921 }
 922
 923 void WebKitPlatformSupportImpl::ResumeSharedTimer() {
 924   // The shared timer may have fired or been adjusted while we were suspended.
 925   if (--shared_timer_suspended_ == 0 &&
 926       (!shared_timer_.IsRunning() ||
 927        shared_timer_fire_time_was_set_while_suspended_)) {
 928     shared_timer_fire_time_was_set_while_suspended_ = false;
 929     setSharedTimerFireInterval(
 930         shared_timer_fire_time_ - monotonicallyIncreasingTime());
 931   }
 932 }
 933
 934 }  // namespace webkit_glue