Revert of Refactoring: Move some classes from content/child to platform (patchset #17 id:320001 of …

content/child/blink_platform_impl.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/child/blink_platform_impl.h"
-
-#include <math.h>
-
-#include <vector>
-
-#include "base/bind.h"
-#include "base/files/file_path.h"
-#include "base/location.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/singleton.h"
-#include "base/metrics/user_metrics_action.h"
-#include "base/rand_util.h"
-#include "base/single_thread_task_runner.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_util.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/synchronization/lock.h"
-#include "base/synchronization/waitable_event.h"
-#include "base/sys_info.h"
-#include "base/thread_task_runner_handle.h"
-#include "base/threading/platform_thread.h"
-#include "base/threading/thread.h"
-#include "base/time/time.h"
-#include "base/trace_event/memory_allocator_dump_guid.h"
-#include "base/trace_event/memory_dump_manager.h"
-#include "base/trace_event/trace_event.h"
-#include "blink/public/resources/grit/blink_image_resources.h"
-#include "blink/public/resources/grit/blink_resources.h"
-#include "build/build_config.h"
-#include "components/mime_util/mime_util.h"
-#include "components/scheduler/child/web_task_runner_impl.h"
-#include "components/scheduler/child/webthread_impl_for_worker_scheduler.h"
-#include "content/app/resources/grit/content_resources.h"
-#include "content/app/strings/grit/content_strings.h"
-#include "content/child/background_sync/background_sync_provider.h"
-#include "content/child/child_thread_impl.h"
-#include "content/child/content_child_helpers.h"
-#include "content/child/geofencing/web_geofencing_provider_impl.h"
-#include "content/child/navigator_connect/service_port_provider.h"
-#include "content/child/notifications/notification_dispatcher.h"
-#include "content/child/notifications/notification_manager.h"
-#include "content/child/permissions/permission_dispatcher.h"
-#include "content/child/permissions/permission_dispatcher_thread_proxy.h"
-#include "content/child/push_messaging/push_dispatcher.h"
-#include "content/child/push_messaging/push_provider.h"
-#include "content/child/thread_safe_sender.h"
-#include "content/child/web_discardable_memory_impl.h"
-#include "content/child/web_url_loader_impl.h"
-#include "content/child/web_url_request_util.h"
-#include "content/child/websocket_bridge.h"
-#include "content/child/worker_thread_registry.h"
-#include "content/public/common/content_client.h"
-#include "net/base/data_url.h"
-#include "net/base/ip_address_number.h"
-#include "net/base/net_errors.h"
-#include "net/base/port_util.h"
-#include "third_party/WebKit/public/platform/WebData.h"
-#include "third_party/WebKit/public/platform/WebFloatPoint.h"
-#include "third_party/WebKit/public/platform/WebMemoryDumpProvider.h"
-#include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/platform/WebURL.h"
-#include "ui/base/layout.h"
-#include "ui/events/gestures/blink/web_gesture_curve_impl.h"
-#include "ui/events/keycodes/dom/keycode_converter.h"
-
-using blink::WebData;
-using blink::WebFallbackThemeEngine;
-using blink::WebLocalizedString;
-using blink::WebString;
-using blink::WebThemeEngine;
-using blink::WebURL;
-using blink::WebURLError;
-using blink::WebURLLoader;
-using scheduler::WebThreadImplForWorkerScheduler;
-
-namespace content {
-
-namespace {
-
-
-}  // namespace
-
-static int ToMessageID(WebLocalizedString::Name name) {
-  switch (name) {
-    case WebLocalizedString::AXAMPMFieldText:
-      return IDS_AX_AM_PM_FIELD_TEXT;
-    case WebLocalizedString::AXButtonActionVerb:
-      return IDS_AX_BUTTON_ACTION_VERB;
-    case WebLocalizedString::AXCalendarShowMonthSelector:
-      return IDS_AX_CALENDAR_SHOW_MONTH_SELECTOR;
-    case WebLocalizedString::AXCalendarShowNextMonth:
-      return IDS_AX_CALENDAR_SHOW_NEXT_MONTH;
-    case WebLocalizedString::AXCalendarShowPreviousMonth:
-      return IDS_AX_CALENDAR_SHOW_PREVIOUS_MONTH;
-    case WebLocalizedString::AXCalendarWeekDescription:
-      return IDS_AX_CALENDAR_WEEK_DESCRIPTION;
-    case WebLocalizedString::AXCheckedCheckBoxActionVerb:
-      return IDS_AX_CHECKED_CHECK_BOX_ACTION_VERB;
-    case WebLocalizedString::AXDateTimeFieldEmptyValueText:
-      return IDS_AX_DATE_TIME_FIELD_EMPTY_VALUE_TEXT;
-    case WebLocalizedString::AXDayOfMonthFieldText:
-      return IDS_AX_DAY_OF_MONTH_FIELD_TEXT;
-    case WebLocalizedString::AXHeadingText:
-      return IDS_AX_ROLE_HEADING;
-    case WebLocalizedString::AXHourFieldText:
-      return IDS_AX_HOUR_FIELD_TEXT;
-    case WebLocalizedString::AXImageMapText:
-      return IDS_AX_ROLE_IMAGE_MAP;
-    case WebLocalizedString::AXLinkActionVerb:
-      return IDS_AX_LINK_ACTION_VERB;
-    case WebLocalizedString::AXLinkText:
-      return IDS_AX_ROLE_LINK;
-    case WebLocalizedString::AXListMarkerText:
-      return IDS_AX_ROLE_LIST_MARKER;
-    case WebLocalizedString::AXMediaDefault:
-      return IDS_AX_MEDIA_DEFAULT;
-    case WebLocalizedString::AXMediaAudioElement:
-      return IDS_AX_MEDIA_AUDIO_ELEMENT;
-    case WebLocalizedString::AXMediaVideoElement:
-      return IDS_AX_MEDIA_VIDEO_ELEMENT;
-    case WebLocalizedString::AXMediaMuteButton:
-      return IDS_AX_MEDIA_MUTE_BUTTON;
-    case WebLocalizedString::AXMediaUnMuteButton:
-      return IDS_AX_MEDIA_UNMUTE_BUTTON;
-    case WebLocalizedString::AXMediaPlayButton:
-      return IDS_AX_MEDIA_PLAY_BUTTON;
-    case WebLocalizedString::AXMediaPauseButton:
-      return IDS_AX_MEDIA_PAUSE_BUTTON;
-    case WebLocalizedString::AXMediaSlider:
-      return IDS_AX_MEDIA_SLIDER;
-    case WebLocalizedString::AXMediaSliderThumb:
-      return IDS_AX_MEDIA_SLIDER_THUMB;
-    case WebLocalizedString::AXMediaCurrentTimeDisplay:
-      return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY;
-    case WebLocalizedString::AXMediaTimeRemainingDisplay:
-      return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY;
-    case WebLocalizedString::AXMediaStatusDisplay:
-      return IDS_AX_MEDIA_STATUS_DISPLAY;
-    case WebLocalizedString::AXMediaEnterFullscreenButton:
-      return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON;
-    case WebLocalizedString::AXMediaExitFullscreenButton:
-      return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON;
-    case WebLocalizedString::AXMediaShowClosedCaptionsButton:
-      return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON;
-    case WebLocalizedString::AXMediaHideClosedCaptionsButton:
-      return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON;
-    case WebLocalizedString::AxMediaCastOffButton:
-      return IDS_AX_MEDIA_CAST_OFF_BUTTON;
-    case WebLocalizedString::AxMediaCastOnButton:
-      return IDS_AX_MEDIA_CAST_ON_BUTTON;
-    case WebLocalizedString::AXMediaAudioElementHelp:
-      return IDS_AX_MEDIA_AUDIO_ELEMENT_HELP;
-    case WebLocalizedString::AXMediaVideoElementHelp:
-      return IDS_AX_MEDIA_VIDEO_ELEMENT_HELP;
-    case WebLocalizedString::AXMediaMuteButtonHelp:
-      return IDS_AX_MEDIA_MUTE_BUTTON_HELP;
-    case WebLocalizedString::AXMediaUnMuteButtonHelp:
-      return IDS_AX_MEDIA_UNMUTE_BUTTON_HELP;
-    case WebLocalizedString::AXMediaPlayButtonHelp:
-      return IDS_AX_MEDIA_PLAY_BUTTON_HELP;
-    case WebLocalizedString::AXMediaPauseButtonHelp:
-      return IDS_AX_MEDIA_PAUSE_BUTTON_HELP;
-    case WebLocalizedString::AXMediaAudioSliderHelp:
-      return IDS_AX_MEDIA_AUDIO_SLIDER_HELP;
-    case WebLocalizedString::AXMediaVideoSliderHelp:
-      return IDS_AX_MEDIA_VIDEO_SLIDER_HELP;
-    case WebLocalizedString::AXMediaSliderThumbHelp:
-      return IDS_AX_MEDIA_SLIDER_THUMB_HELP;
-    case WebLocalizedString::AXMediaCurrentTimeDisplayHelp:
-      return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY_HELP;
-    case WebLocalizedString::AXMediaTimeRemainingDisplayHelp:
-      return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY_HELP;
-    case WebLocalizedString::AXMediaStatusDisplayHelp:
-      return IDS_AX_MEDIA_STATUS_DISPLAY_HELP;
-    case WebLocalizedString::AXMediaEnterFullscreenButtonHelp:
-      return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON_HELP;
-    case WebLocalizedString::AXMediaExitFullscreenButtonHelp:
-      return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON_HELP;
-    case WebLocalizedString::AXMediaShowClosedCaptionsButtonHelp:
-      return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON_HELP;
-    case WebLocalizedString::AXMediaHideClosedCaptionsButtonHelp:
-      return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON_HELP;
-    case WebLocalizedString::AxMediaCastOffButtonHelp:
-      return IDS_AX_MEDIA_CAST_OFF_BUTTON_HELP;
-    case WebLocalizedString::AxMediaCastOnButtonHelp:
-      return IDS_AX_MEDIA_CAST_ON_BUTTON_HELP;
-    case WebLocalizedString::AXMillisecondFieldText:
-      return IDS_AX_MILLISECOND_FIELD_TEXT;
-    case WebLocalizedString::AXMinuteFieldText:
-      return IDS_AX_MINUTE_FIELD_TEXT;
-    case WebLocalizedString::AXMonthFieldText:
-      return IDS_AX_MONTH_FIELD_TEXT;
-    case WebLocalizedString::AXRadioButtonActionVerb:
-      return IDS_AX_RADIO_BUTTON_ACTION_VERB;
-    case WebLocalizedString::AXSecondFieldText:
-      return IDS_AX_SECOND_FIELD_TEXT;
-    case WebLocalizedString::AXTextFieldActionVerb:
-      return IDS_AX_TEXT_FIELD_ACTION_VERB;
-    case WebLocalizedString::AXUncheckedCheckBoxActionVerb:
-      return IDS_AX_UNCHECKED_CHECK_BOX_ACTION_VERB;
-    case WebLocalizedString::AXWebAreaText:
-      return IDS_AX_ROLE_WEB_AREA;
-    case WebLocalizedString::AXWeekOfYearFieldText:
-      return IDS_AX_WEEK_OF_YEAR_FIELD_TEXT;
-    case WebLocalizedString::AXYearFieldText:
-      return IDS_AX_YEAR_FIELD_TEXT;
-    case WebLocalizedString::CalendarClear:
-      return IDS_FORM_CALENDAR_CLEAR;
-    case WebLocalizedString::CalendarToday:
-      return IDS_FORM_CALENDAR_TODAY;
-    case WebLocalizedString::DateFormatDayInMonthLabel:
-      return IDS_FORM_DATE_FORMAT_DAY_IN_MONTH;
-    case WebLocalizedString::DateFormatMonthLabel:
-      return IDS_FORM_DATE_FORMAT_MONTH;
-    case WebLocalizedString::DateFormatYearLabel:
-      return IDS_FORM_DATE_FORMAT_YEAR;
-    case WebLocalizedString::DetailsLabel:
-      return IDS_DETAILS_WITHOUT_SUMMARY_LABEL;
-    case WebLocalizedString::FileButtonChooseFileLabel:
-      return IDS_FORM_FILE_BUTTON_LABEL;
-    case WebLocalizedString::FileButtonChooseMultipleFilesLabel:
-      return IDS_FORM_MULTIPLE_FILES_BUTTON_LABEL;
-    case WebLocalizedString::FileButtonNoFileSelectedLabel:
-      return IDS_FORM_FILE_NO_FILE_LABEL;
-    case WebLocalizedString::InputElementAltText:
-      return IDS_FORM_INPUT_ALT;
-    case WebLocalizedString::KeygenMenuHighGradeKeySize:
-      return IDS_KEYGEN_HIGH_GRADE_KEY;
-    case WebLocalizedString::KeygenMenuMediumGradeKeySize:
-      return IDS_KEYGEN_MED_GRADE_KEY;
-    case WebLocalizedString::MissingPluginText:
-      return IDS_PLUGIN_INITIALIZATION_ERROR;
-    case WebLocalizedString::MultipleFileUploadText:
-      return IDS_FORM_FILE_MULTIPLE_UPLOAD;
-    case WebLocalizedString::OtherColorLabel:
-      return IDS_FORM_OTHER_COLOR_LABEL;
-    case WebLocalizedString::OtherDateLabel:
-        return IDS_FORM_OTHER_DATE_LABEL;
-    case WebLocalizedString::OtherMonthLabel:
-      return IDS_FORM_OTHER_MONTH_LABEL;
-    case WebLocalizedString::OtherTimeLabel:
-      return IDS_FORM_OTHER_TIME_LABEL;
-    case WebLocalizedString::OtherWeekLabel:
-      return IDS_FORM_OTHER_WEEK_LABEL;
-    case WebLocalizedString::PlaceholderForDayOfMonthField:
-      return IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD;
-    case WebLocalizedString::PlaceholderForMonthField:
-      return IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD;
-    case WebLocalizedString::PlaceholderForYearField:
-      return IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD;
-    case WebLocalizedString::ResetButtonDefaultLabel:
-      return IDS_FORM_RESET_LABEL;
-    case WebLocalizedString::SearchableIndexIntroduction:
-      return IDS_SEARCHABLE_INDEX_INTRO;
-    case WebLocalizedString::SearchMenuClearRecentSearchesText:
-      return IDS_RECENT_SEARCHES_CLEAR;
-    case WebLocalizedString::SearchMenuNoRecentSearchesText:
-      return IDS_RECENT_SEARCHES_NONE;
-    case WebLocalizedString::SearchMenuRecentSearchesText:
-      return IDS_RECENT_SEARCHES;
-    case WebLocalizedString::SelectMenuListText:
-      return IDS_FORM_SELECT_MENU_LIST_TEXT;
-    case WebLocalizedString::SubmitButtonDefaultLabel:
-      return IDS_FORM_SUBMIT_LABEL;
-    case WebLocalizedString::ThisMonthButtonLabel:
-      return IDS_FORM_THIS_MONTH_LABEL;
-    case WebLocalizedString::ThisWeekButtonLabel:
-      return IDS_FORM_THIS_WEEK_LABEL;
-    case WebLocalizedString::ValidationBadInputForDateTime:
-      return IDS_FORM_VALIDATION_BAD_INPUT_DATETIME;
-    case WebLocalizedString::ValidationBadInputForNumber:
-      return IDS_FORM_VALIDATION_BAD_INPUT_NUMBER;
-    case WebLocalizedString::ValidationPatternMismatch:
-      return IDS_FORM_VALIDATION_PATTERN_MISMATCH;
-    case WebLocalizedString::ValidationRangeOverflow:
-      return IDS_FORM_VALIDATION_RANGE_OVERFLOW;
-    case WebLocalizedString::ValidationRangeOverflowDateTime:
-      return IDS_FORM_VALIDATION_RANGE_OVERFLOW_DATETIME;
-    case WebLocalizedString::ValidationRangeUnderflow:
-      return IDS_FORM_VALIDATION_RANGE_UNDERFLOW;
-    case WebLocalizedString::ValidationRangeUnderflowDateTime:
-      return IDS_FORM_VALIDATION_RANGE_UNDERFLOW_DATETIME;
-    case WebLocalizedString::ValidationStepMismatch:
-      return IDS_FORM_VALIDATION_STEP_MISMATCH;
-    case WebLocalizedString::ValidationStepMismatchCloseToLimit:
-      return IDS_FORM_VALIDATION_STEP_MISMATCH_CLOSE_TO_LIMIT;
-    case WebLocalizedString::ValidationTooLong:
-      return IDS_FORM_VALIDATION_TOO_LONG;
-    case WebLocalizedString::ValidationTooShort:
-      return IDS_FORM_VALIDATION_TOO_SHORT;
-    case WebLocalizedString::ValidationTypeMismatch:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH;
-    case WebLocalizedString::ValidationTypeMismatchForEmail:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL;
-    case WebLocalizedString::ValidationTypeMismatchForEmailEmpty:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY;
-    case WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_DOMAIN;
-    case WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_LOCAL;
-    case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOMAIN;
-    case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOTS;
-    case WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_LOCAL;
-    case WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_NO_AT_SIGN;
-    case WebLocalizedString::ValidationTypeMismatchForMultipleEmail:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_MULTIPLE_EMAIL;
-    case WebLocalizedString::ValidationTypeMismatchForURL:
-      return IDS_FORM_VALIDATION_TYPE_MISMATCH_URL;
-    case WebLocalizedString::ValidationValueMissing:
-      return IDS_FORM_VALIDATION_VALUE_MISSING;
-    case WebLocalizedString::ValidationValueMissingForCheckbox:
-      return IDS_FORM_VALIDATION_VALUE_MISSING_CHECKBOX;
-    case WebLocalizedString::ValidationValueMissingForFile:
-      return IDS_FORM_VALIDATION_VALUE_MISSING_FILE;
-    case WebLocalizedString::ValidationValueMissingForMultipleFile:
-      return IDS_FORM_VALIDATION_VALUE_MISSING_MULTIPLE_FILE;
-    case WebLocalizedString::ValidationValueMissingForRadio:
-      return IDS_FORM_VALIDATION_VALUE_MISSING_RADIO;
-    case WebLocalizedString::ValidationValueMissingForSelect:
-      return IDS_FORM_VALIDATION_VALUE_MISSING_SELECT;
-    case WebLocalizedString::WeekFormatTemplate:
-      return IDS_FORM_INPUT_WEEK_TEMPLATE;
-    case WebLocalizedString::WeekNumberLabel:
-      return IDS_FORM_WEEK_NUMBER_LABEL;
-    // This "default:" line exists to avoid compile warnings about enum
-    // coverage when we add a new symbol to WebLocalizedString.h in WebKit.
-    // After a planned WebKit patch is landed, we need to add a case statement
-    // for the added symbol here.
-    default:
-      break;
-  }
-  return -1;
-}
-
-class TraceLogObserverAdapter
-    : public base::trace_event::TraceLog::EnabledStateObserver {
- public:
-  TraceLogObserverAdapter(
-      blink::Platform::TraceLogEnabledStateObserver* observer)
-      : observer_(observer) {}
-
-  void OnTraceLogEnabled() override { observer_->onTraceLogEnabled(); }
-
-  void OnTraceLogDisabled() override { observer_->onTraceLogDisabled(); }
-
- private:
-  blink::Platform::TraceLogEnabledStateObserver* observer_;
-  DISALLOW_COPY_AND_ASSIGN(TraceLogObserverAdapter);
-};
-
-// TODO(skyostil): Ensure that we always have an active task runner when
-// constructing the platform.
-BlinkPlatformImpl::BlinkPlatformImpl()
-    : BlinkPlatformImpl(base::ThreadTaskRunnerHandle::IsSet()
-                            ? base::ThreadTaskRunnerHandle::Get()
-                            : nullptr) {
-}
-
-BlinkPlatformImpl::BlinkPlatformImpl(
-    scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner)
-    : main_thread_task_runner_(main_thread_task_runner),
-      compositor_thread_(nullptr) {
-  InternalInit();
-}
-
-void BlinkPlatformImpl::InternalInit() {
-  // ChildThread may not exist in some tests.
-  if (ChildThreadImpl::current()) {
-    geofencing_provider_.reset(new WebGeofencingProviderImpl(
-        ChildThreadImpl::current()->thread_safe_sender()));
-    thread_safe_sender_ = ChildThreadImpl::current()->thread_safe_sender();
-    notification_dispatcher_ =
-        ChildThreadImpl::current()->notification_dispatcher();
-    push_dispatcher_ = ChildThreadImpl::current()->push_dispatcher();
-    permission_client_.reset(new PermissionDispatcher(
-        ChildThreadImpl::current()->service_registry()));
-    main_thread_sync_provider_.reset(
-        new BackgroundSyncProvider(main_thread_task_runner_.get()));
-  }
-}
-
-void BlinkPlatformImpl::WaitUntilWebThreadTLSUpdate(
-    scheduler::WebThreadBase* thread) {
-  base::WaitableEvent event(false, false);
-  thread->TaskRunner()->PostTask(
-      FROM_HERE,
-      base::Bind(&BlinkPlatformImpl::UpdateWebThreadTLS, base::Unretained(this),
-                 base::Unretained(thread), base::Unretained(&event)));
-  event.Wait();
-}
-
-void BlinkPlatformImpl::UpdateWebThreadTLS(blink::WebThread* thread,
-                                           base::WaitableEvent* event) {
-  DCHECK(!current_thread_slot_.Get());
-  current_thread_slot_.Set(thread);
-  event->Signal();
-}
-
-BlinkPlatformImpl::~BlinkPlatformImpl() {
-}
-
-WebURLLoader* BlinkPlatformImpl::createURLLoader() {
-  ChildThreadImpl* child_thread = ChildThreadImpl::current();
-  // There may be no child thread in RenderViewTests.  These tests can still use
-  // data URLs to bypass the ResourceDispatcher.
-  return new WebURLLoaderImpl(
-      child_thread ? child_thread->resource_dispatcher() : NULL,
-      make_scoped_ptr(currentThread()->taskRunner()->clone()));
-}
-
-blink::WebSocketHandle* BlinkPlatformImpl::createWebSocketHandle() {
-  return new WebSocketBridge;
-}
-
-WebString BlinkPlatformImpl::userAgent() {
-  CR_DEFINE_STATIC_LOCAL(
-      blink::WebString, user_agent,
-      (blink::WebString::fromUTF8(GetContentClient()->GetUserAgent())));
-  DCHECK(user_agent ==
-         blink::WebString::fromUTF8(GetContentClient()->GetUserAgent()));
-  return user_agent;
-}
-
-WebData BlinkPlatformImpl::parseDataURL(const WebURL& url,
-                                        WebString& mimetype_out,
-                                        WebString& charset_out) {
-  std::string mime_type, char_set, data;
-  if (net::DataURL::Parse(url, &mime_type, &char_set, &data) &&
-      mime_util::IsSupportedMimeType(mime_type)) {
-    mimetype_out = WebString::fromUTF8(mime_type);
-    charset_out = WebString::fromUTF8(char_set);
-    return data;
-  }
-  return WebData();
-}
-
-WebURLError BlinkPlatformImpl::cancelledError(
-    const WebURL& unreachableURL) const {
-  return CreateWebURLError(unreachableURL, false, net::ERR_ABORTED);
-}
-
-bool BlinkPlatformImpl::isReservedIPAddress(
-    const blink::WebString& host) const {
-  net::IPAddressNumber address;
-  if (!net::ParseURLHostnameToNumber(host.utf8(), &address))
-    return false;
-  return net::IsIPAddressReserved(address);
-}
-
-bool BlinkPlatformImpl::portAllowed(const blink::WebURL& url) const {
-  GURL gurl = GURL(url);
-  // Return true for URLs without a port specified.  This is needed to let
-  // through non-network schemes that don't go over the network.
-  if (!gurl.has_port())
-    return true;
-  return net::IsPortAllowedForScheme(gurl.EffectiveIntPort(), gurl.scheme());
-}
-
-blink::WebThread* BlinkPlatformImpl::createThread(const char* name) {
-  scoped_ptr<WebThreadImplForWorkerScheduler> thread(
-      new WebThreadImplForWorkerScheduler(name));
-  thread->Init();
-  WaitUntilWebThreadTLSUpdate(thread.get());
-  return thread.release();
-}
-
-void BlinkPlatformImpl::SetCompositorThread(
-    scheduler::WebThreadBase* compositor_thread) {
-  compositor_thread_ = compositor_thread;
-  if (compositor_thread_)
-    WaitUntilWebThreadTLSUpdate(compositor_thread_);
-}
-
-blink::WebThread* BlinkPlatformImpl::currentThread() {
-  return static_cast<blink::WebThread*>(current_thread_slot_.Get());
-}
-
-void BlinkPlatformImpl::recordAction(const blink::UserMetricsAction& name) {
-    if (ChildThread* child_thread = ChildThread::Get())
-        child_thread->RecordComputedAction(name.action());
-}
+  // Copyright 2014 The Chromium Authors. All rights reserved.
+  // Use of this source code is governed by a BSD-style license that can be
+  // found in the LICENSE file.
+
+  #include "content/child/blink_platform_impl.h"
+
+  #include <math.h>
+
+  #include <vector>
+
+  #include "base/bind.h"
+  #include "base/files/file_path.h"
+  #include "base/location.h"
+  #include "base/macros.h"
+  #include "base/memory/scoped_ptr.h"
+  #include "base/memory/singleton.h"
+  #include "base/metrics/user_metrics_action.h"
+  #include "base/rand_util.h"
+  #include "base/single_thread_task_runner.h"
+  #include "base/strings/string_number_conversions.h"
+  #include "base/strings/string_util.h"
+  #include "base/strings/utf_string_conversions.h"
+  #include "base/synchronization/lock.h"
+  #include "base/synchronization/waitable_event.h"
+  #include "base/sys_info.h"
+  #include "base/thread_task_runner_handle.h"
+  #include "base/threading/platform_thread.h"
+  #include "base/threading/thread.h"
+  #include "base/time/time.h"
+  #include "base/trace_event/memory_allocator_dump_guid.h"
+  #include "base/trace_event/memory_dump_manager.h"
+  #include "base/trace_event/trace_event.h"
+  #include "blink/public/resources/grit/blink_image_resources.h"
+  #include "blink/public/resources/grit/blink_resources.h"
+  #include "build/build_config.h"
+  #include "components/mime_util/mime_util.h"
+  #include "components/scheduler/child/web_task_runner_impl.h"
+  #include "components/scheduler/child/webthread_impl_for_worker_scheduler.h"
+  #include "content/app/resources/grit/content_resources.h"
+  #include "content/app/strings/grit/content_strings.h"
+  #include "content/child/background_sync/background_sync_provider.h"
+  #include "content/child/child_thread_impl.h"
+  #include "content/child/content_child_helpers.h"
+  #include "content/child/geofencing/web_geofencing_provider_impl.h"
+  #include "content/child/navigator_connect/service_port_provider.h"
+  #include "content/child/notifications/notification_dispatcher.h"
+  #include "content/child/notifications/notification_manager.h"
+  #include "content/child/permissions/permission_dispatcher.h"
+  #include "content/child/permissions/permission_dispatcher_thread_proxy.h"
+  #include "content/child/push_messaging/push_dispatcher.h"
+  #include "content/child/push_messaging/push_provider.h"
+  #include "content/child/thread_safe_sender.h"
+  #include "content/child/web_discardable_memory_impl.h"
+  #include "content/child/web_memory_dump_provider_adapter.h"
+  #include "content/child/web_process_memory_dump_impl.h"
+  #include "content/child/web_url_loader_impl.h"
+  #include "content/child/web_url_request_util.h"
+  #include "content/child/websocket_bridge.h"
+  #include "content/child/worker_thread_registry.h"
+  #include "content/public/common/content_client.h"
+  #include "net/base/data_url.h"
+  #include "net/base/ip_address_number.h"
+  #include "net/base/net_errors.h"
+  #include "net/base/port_util.h"
+  #include "third_party/WebKit/public/platform/WebData.h"
+  #include "third_party/WebKit/public/platform/WebFloatPoint.h"
+  #include "third_party/WebKit/public/platform/WebMemoryDumpProvider.h"
+  #include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
+  #include "third_party/WebKit/public/platform/WebString.h"
+  #include "third_party/WebKit/public/platform/WebURL.h"
+  #include "ui/base/layout.h"
+  #include "ui/events/gestures/blink/web_gesture_curve_impl.h"
+  #include "ui/events/keycodes/dom/keycode_converter.h"
+
+  using blink::WebData;
+  using blink::WebFallbackThemeEngine;
+  using blink::WebLocalizedString;
+  using blink::WebString;
+  using blink::WebThemeEngine;
+  using blink::WebURL;
+  using blink::WebURLError;
+  using blink::WebURLLoader;
+  using scheduler::WebThreadImplForWorkerScheduler;
+
+  namespace content {
+
+  namespace {
+
+
+  }  // namespace
+
+  static int ToMessageID(WebLocalizedString::Name name) {
+    switch (name) {
+      case WebLocalizedString::AXAMPMFieldText:
+        return IDS_AX_AM_PM_FIELD_TEXT;
+      case WebLocalizedString::AXButtonActionVerb:
+        return IDS_AX_BUTTON_ACTION_VERB;
+      case WebLocalizedString::AXCalendarShowMonthSelector:
+        return IDS_AX_CALENDAR_SHOW_MONTH_SELECTOR;
+      case WebLocalizedString::AXCalendarShowNextMonth:
+        return IDS_AX_CALENDAR_SHOW_NEXT_MONTH;
+      case WebLocalizedString::AXCalendarShowPreviousMonth:
+        return IDS_AX_CALENDAR_SHOW_PREVIOUS_MONTH;
+      case WebLocalizedString::AXCalendarWeekDescription:
+        return IDS_AX_CALENDAR_WEEK_DESCRIPTION;
+      case WebLocalizedString::AXCheckedCheckBoxActionVerb:
+        return IDS_AX_CHECKED_CHECK_BOX_ACTION_VERB;
+      case WebLocalizedString::AXDateTimeFieldEmptyValueText:
+        return IDS_AX_DATE_TIME_FIELD_EMPTY_VALUE_TEXT;
+      case WebLocalizedString::AXDayOfMonthFieldText:
+        return IDS_AX_DAY_OF_MONTH_FIELD_TEXT;
+      case WebLocalizedString::AXHeadingText:
+        return IDS_AX_ROLE_HEADING;
+      case WebLocalizedString::AXHourFieldText:
+        return IDS_AX_HOUR_FIELD_TEXT;
+      case WebLocalizedString::AXImageMapText:
+        return IDS_AX_ROLE_IMAGE_MAP;
+      case WebLocalizedString::AXLinkActionVerb:
+        return IDS_AX_LINK_ACTION_VERB;
+      case WebLocalizedString::AXLinkText:
+        return IDS_AX_ROLE_LINK;
+      case WebLocalizedString::AXListMarkerText:
+        return IDS_AX_ROLE_LIST_MARKER;
+      case WebLocalizedString::AXMediaDefault:
+        return IDS_AX_MEDIA_DEFAULT;
+      case WebLocalizedString::AXMediaAudioElement:
+        return IDS_AX_MEDIA_AUDIO_ELEMENT;
+      case WebLocalizedString::AXMediaVideoElement:
+        return IDS_AX_MEDIA_VIDEO_ELEMENT;
+      case WebLocalizedString::AXMediaMuteButton:
+        return IDS_AX_MEDIA_MUTE_BUTTON;
+      case WebLocalizedString::AXMediaUnMuteButton:
+        return IDS_AX_MEDIA_UNMUTE_BUTTON;
+      case WebLocalizedString::AXMediaPlayButton:
+        return IDS_AX_MEDIA_PLAY_BUTTON;
+      case WebLocalizedString::AXMediaPauseButton:
+        return IDS_AX_MEDIA_PAUSE_BUTTON;
+      case WebLocalizedString::AXMediaSlider:
+        return IDS_AX_MEDIA_SLIDER;
+      case WebLocalizedString::AXMediaSliderThumb:
+        return IDS_AX_MEDIA_SLIDER_THUMB;
+      case WebLocalizedString::AXMediaCurrentTimeDisplay:
+        return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY;
+      case WebLocalizedString::AXMediaTimeRemainingDisplay:
+        return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY;
+      case WebLocalizedString::AXMediaStatusDisplay:
+        return IDS_AX_MEDIA_STATUS_DISPLAY;
+      case WebLocalizedString::AXMediaEnterFullscreenButton:
+        return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON;
+      case WebLocalizedString::AXMediaExitFullscreenButton:
+        return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON;
+      case WebLocalizedString::AXMediaShowClosedCaptionsButton:
+        return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON;
+      case WebLocalizedString::AXMediaHideClosedCaptionsButton:
+        return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON;
+      case WebLocalizedString::AxMediaCastOffButton:
+        return IDS_AX_MEDIA_CAST_OFF_BUTTON;
+      case WebLocalizedString::AxMediaCastOnButton:
+        return IDS_AX_MEDIA_CAST_ON_BUTTON;
+      case WebLocalizedString::AXMediaAudioElementHelp:
+        return IDS_AX_MEDIA_AUDIO_ELEMENT_HELP;
+      case WebLocalizedString::AXMediaVideoElementHelp:
+        return IDS_AX_MEDIA_VIDEO_ELEMENT_HELP;
+      case WebLocalizedString::AXMediaMuteButtonHelp:
+        return IDS_AX_MEDIA_MUTE_BUTTON_HELP;
+      case WebLocalizedString::AXMediaUnMuteButtonHelp:
+        return IDS_AX_MEDIA_UNMUTE_BUTTON_HELP;
+      case WebLocalizedString::AXMediaPlayButtonHelp:
+        return IDS_AX_MEDIA_PLAY_BUTTON_HELP;
+      case WebLocalizedString::AXMediaPauseButtonHelp:
+        return IDS_AX_MEDIA_PAUSE_BUTTON_HELP;
+      case WebLocalizedString::AXMediaAudioSliderHelp:
+        return IDS_AX_MEDIA_AUDIO_SLIDER_HELP;
+      case WebLocalizedString::AXMediaVideoSliderHelp:
+        return IDS_AX_MEDIA_VIDEO_SLIDER_HELP;
+      case WebLocalizedString::AXMediaSliderThumbHelp:
+        return IDS_AX_MEDIA_SLIDER_THUMB_HELP;
+      case WebLocalizedString::AXMediaCurrentTimeDisplayHelp:
+        return IDS_AX_MEDIA_CURRENT_TIME_DISPLAY_HELP;
+      case WebLocalizedString::AXMediaTimeRemainingDisplayHelp:
+        return IDS_AX_MEDIA_TIME_REMAINING_DISPLAY_HELP;
+      case WebLocalizedString::AXMediaStatusDisplayHelp:
+        return IDS_AX_MEDIA_STATUS_DISPLAY_HELP;
+      case WebLocalizedString::AXMediaEnterFullscreenButtonHelp:
+        return IDS_AX_MEDIA_ENTER_FULL_SCREEN_BUTTON_HELP;
+      case WebLocalizedString::AXMediaExitFullscreenButtonHelp:
+        return IDS_AX_MEDIA_EXIT_FULL_SCREEN_BUTTON_HELP;
+      case WebLocalizedString::AXMediaShowClosedCaptionsButtonHelp:
+        return IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON_HELP;
+      case WebLocalizedString::AXMediaHideClosedCaptionsButtonHelp:
+        return IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON_HELP;
+      case WebLocalizedString::AxMediaCastOffButtonHelp:
+        return IDS_AX_MEDIA_CAST_OFF_BUTTON_HELP;
+      case WebLocalizedString::AxMediaCastOnButtonHelp:
+        return IDS_AX_MEDIA_CAST_ON_BUTTON_HELP;
+      case WebLocalizedString::AXMillisecondFieldText:
+        return IDS_AX_MILLISECOND_FIELD_TEXT;
+      case WebLocalizedString::AXMinuteFieldText:
+        return IDS_AX_MINUTE_FIELD_TEXT;
+      case WebLocalizedString::AXMonthFieldText:
+        return IDS_AX_MONTH_FIELD_TEXT;
+      case WebLocalizedString::AXRadioButtonActionVerb:
+        return IDS_AX_RADIO_BUTTON_ACTION_VERB;
+      case WebLocalizedString::AXSecondFieldText:
+        return IDS_AX_SECOND_FIELD_TEXT;
+      case WebLocalizedString::AXTextFieldActionVerb:
+        return IDS_AX_TEXT_FIELD_ACTION_VERB;
+      case WebLocalizedString::AXUncheckedCheckBoxActionVerb:
+        return IDS_AX_UNCHECKED_CHECK_BOX_ACTION_VERB;
+      case WebLocalizedString::AXWebAreaText:
+        return IDS_AX_ROLE_WEB_AREA;
+      case WebLocalizedString::AXWeekOfYearFieldText:
+        return IDS_AX_WEEK_OF_YEAR_FIELD_TEXT;
+      case WebLocalizedString::AXYearFieldText:
+        return IDS_AX_YEAR_FIELD_TEXT;
+      case WebLocalizedString::CalendarClear:
+        return IDS_FORM_CALENDAR_CLEAR;
+      case WebLocalizedString::CalendarToday:
+        return IDS_FORM_CALENDAR_TODAY;
+      case WebLocalizedString::DateFormatDayInMonthLabel:
+        return IDS_FORM_DATE_FORMAT_DAY_IN_MONTH;
+      case WebLocalizedString::DateFormatMonthLabel:
+        return IDS_FORM_DATE_FORMAT_MONTH;
+      case WebLocalizedString::DateFormatYearLabel:
+        return IDS_FORM_DATE_FORMAT_YEAR;
+      case WebLocalizedString::DetailsLabel:
+        return IDS_DETAILS_WITHOUT_SUMMARY_LABEL;
+      case WebLocalizedString::FileButtonChooseFileLabel:
+        return IDS_FORM_FILE_BUTTON_LABEL;
+      case WebLocalizedString::FileButtonChooseMultipleFilesLabel:
+        return IDS_FORM_MULTIPLE_FILES_BUTTON_LABEL;
+      case WebLocalizedString::FileButtonNoFileSelectedLabel:
+        return IDS_FORM_FILE_NO_FILE_LABEL;
+      case WebLocalizedString::InputElementAltText:
+        return IDS_FORM_INPUT_ALT;
+      case WebLocalizedString::KeygenMenuHighGradeKeySize:
+        return IDS_KEYGEN_HIGH_GRADE_KEY;
+      case WebLocalizedString::KeygenMenuMediumGradeKeySize:
+        return IDS_KEYGEN_MED_GRADE_KEY;
+      case WebLocalizedString::MissingPluginText:
+        return IDS_PLUGIN_INITIALIZATION_ERROR;
+      case WebLocalizedString::MultipleFileUploadText:
+        return IDS_FORM_FILE_MULTIPLE_UPLOAD;
+      case WebLocalizedString::OtherColorLabel:
+        return IDS_FORM_OTHER_COLOR_LABEL;
+      case WebLocalizedString::OtherDateLabel:
+          return IDS_FORM_OTHER_DATE_LABEL;
+      case WebLocalizedString::OtherMonthLabel:
+        return IDS_FORM_OTHER_MONTH_LABEL;
+      case WebLocalizedString::OtherTimeLabel:
+        return IDS_FORM_OTHER_TIME_LABEL;
+      case WebLocalizedString::OtherWeekLabel:
+        return IDS_FORM_OTHER_WEEK_LABEL;
+      case WebLocalizedString::PlaceholderForDayOfMonthField:
+        return IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD;
+      case WebLocalizedString::PlaceholderForMonthField:
+        return IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD;
+      case WebLocalizedString::PlaceholderForYearField:
+        return IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD;
+      case WebLocalizedString::ResetButtonDefaultLabel:
+        return IDS_FORM_RESET_LABEL;
+      case WebLocalizedString::SearchableIndexIntroduction:
+        return IDS_SEARCHABLE_INDEX_INTRO;
+      case WebLocalizedString::SearchMenuClearRecentSearchesText:
+        return IDS_RECENT_SEARCHES_CLEAR;
+      case WebLocalizedString::SearchMenuNoRecentSearchesText:
+        return IDS_RECENT_SEARCHES_NONE;
+      case WebLocalizedString::SearchMenuRecentSearchesText:
+        return IDS_RECENT_SEARCHES;
+      case WebLocalizedString::SelectMenuListText:
+        return IDS_FORM_SELECT_MENU_LIST_TEXT;
+      case WebLocalizedString::SubmitButtonDefaultLabel:
+        return IDS_FORM_SUBMIT_LABEL;
+      case WebLocalizedString::ThisMonthButtonLabel:
+        return IDS_FORM_THIS_MONTH_LABEL;
+      case WebLocalizedString::ThisWeekButtonLabel:
+        return IDS_FORM_THIS_WEEK_LABEL;
+      case WebLocalizedString::ValidationBadInputForDateTime:
+        return IDS_FORM_VALIDATION_BAD_INPUT_DATETIME;
+      case WebLocalizedString::ValidationBadInputForNumber:
+        return IDS_FORM_VALIDATION_BAD_INPUT_NUMBER;
+      case WebLocalizedString::ValidationPatternMismatch:
+        return IDS_FORM_VALIDATION_PATTERN_MISMATCH;
+      case WebLocalizedString::ValidationRangeOverflow:
+        return IDS_FORM_VALIDATION_RANGE_OVERFLOW;
+      case WebLocalizedString::ValidationRangeOverflowDateTime:
+        return IDS_FORM_VALIDATION_RANGE_OVERFLOW_DATETIME;
+      case WebLocalizedString::ValidationRangeUnderflow:
+        return IDS_FORM_VALIDATION_RANGE_UNDERFLOW;
+      case WebLocalizedString::ValidationRangeUnderflowDateTime:
+        return IDS_FORM_VALIDATION_RANGE_UNDERFLOW_DATETIME;
+      case WebLocalizedString::ValidationStepMismatch:
+        return IDS_FORM_VALIDATION_STEP_MISMATCH;
+      case WebLocalizedString::ValidationStepMismatchCloseToLimit:
+        return IDS_FORM_VALIDATION_STEP_MISMATCH_CLOSE_TO_LIMIT;
+      case WebLocalizedString::ValidationTooLong:
+        return IDS_FORM_VALIDATION_TOO_LONG;
+      case WebLocalizedString::ValidationTooShort:
+        return IDS_FORM_VALIDATION_TOO_SHORT;
+      case WebLocalizedString::ValidationTypeMismatch:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH;
+      case WebLocalizedString::ValidationTypeMismatchForEmail:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL;
+      case WebLocalizedString::ValidationTypeMismatchForEmailEmpty:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY;
+      case WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_DOMAIN;
+      case WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_EMPTY_LOCAL;
+      case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOMAIN;
+      case WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_DOTS;
+      case WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_INVALID_LOCAL;
+      case WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_EMAIL_NO_AT_SIGN;
+      case WebLocalizedString::ValidationTypeMismatchForMultipleEmail:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_MULTIPLE_EMAIL;
+      case WebLocalizedString::ValidationTypeMismatchForURL:
+        return IDS_FORM_VALIDATION_TYPE_MISMATCH_URL;
+      case WebLocalizedString::ValidationValueMissing:
+        return IDS_FORM_VALIDATION_VALUE_MISSING;
+      case WebLocalizedString::ValidationValueMissingForCheckbox:
+        return IDS_FORM_VALIDATION_VALUE_MISSING_CHECKBOX;
+      case WebLocalizedString::ValidationValueMissingForFile:
+        return IDS_FORM_VALIDATION_VALUE_MISSING_FILE;
+      case WebLocalizedString::ValidationValueMissingForMultipleFile:
+        return IDS_FORM_VALIDATION_VALUE_MISSING_MULTIPLE_FILE;
+      case WebLocalizedString::ValidationValueMissingForRadio:
+        return IDS_FORM_VALIDATION_VALUE_MISSING_RADIO;
+      case WebLocalizedString::ValidationValueMissingForSelect:
+        return IDS_FORM_VALIDATION_VALUE_MISSING_SELECT;
+      case WebLocalizedString::WeekFormatTemplate:
+        return IDS_FORM_INPUT_WEEK_TEMPLATE;
+      case WebLocalizedString::WeekNumberLabel:
+        return IDS_FORM_WEEK_NUMBER_LABEL;
+      // This "default:" line exists to avoid compile warnings about enum
+      // coverage when we add a new symbol to WebLocalizedString.h in WebKit.
+      // After a planned WebKit patch is landed, we need to add a case statement
+      // for the added symbol here.
+      default:
+        break;
+    }
+    return -1;
+  }
+
+  class TraceLogObserverAdapter
+      : public base::trace_event::TraceLog::EnabledStateObserver {
+   public:
+    TraceLogObserverAdapter(
+        blink::Platform::TraceLogEnabledStateObserver* observer)
+        : observer_(observer) {}
+
+    void OnTraceLogEnabled() override { observer_->onTraceLogEnabled(); }
+
+    void OnTraceLogDisabled() override { observer_->onTraceLogDisabled(); }
+
+   private:
+    blink::Platform::TraceLogEnabledStateObserver* observer_;
+    DISALLOW_COPY_AND_ASSIGN(TraceLogObserverAdapter);
+  };
+
+  // TODO(skyostil): Ensure that we always have an active task runner when
+  // constructing the platform.
+  BlinkPlatformImpl::BlinkPlatformImpl()
+      : BlinkPlatformImpl(base::ThreadTaskRunnerHandle::IsSet()
+                              ? base::ThreadTaskRunnerHandle::Get()
+                              : nullptr) {
+  }
+
+  BlinkPlatformImpl::BlinkPlatformImpl(
+      scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner)
+      : main_thread_task_runner_(main_thread_task_runner),
+        compositor_thread_(nullptr) {
+    InternalInit();
+  }
+
+  void BlinkPlatformImpl::InternalInit() {
+    // ChildThread may not exist in some tests.
+    if (ChildThreadImpl::current()) {
+      geofencing_provider_.reset(new WebGeofencingProviderImpl(
+          ChildThreadImpl::current()->thread_safe_sender()));
+      thread_safe_sender_ = ChildThreadImpl::current()->thread_safe_sender();
+      notification_dispatcher_ =
+          ChildThreadImpl::current()->notification_dispatcher();
+      push_dispatcher_ = ChildThreadImpl::current()->push_dispatcher();
+      permission_client_.reset(new PermissionDispatcher(
+          ChildThreadImpl::current()->service_registry()));
+      main_thread_sync_provider_.reset(
+          new BackgroundSyncProvider(main_thread_task_runner_.get()));
+    }
+  }
+
+  void BlinkPlatformImpl::WaitUntilWebThreadTLSUpdate(
+      scheduler::WebThreadBase* thread) {
+    base::WaitableEvent event(false, false);
+    thread->TaskRunner()->PostTask(
+        FROM_HERE,
+        base::Bind(&BlinkPlatformImpl::UpdateWebThreadTLS, base::Unretained(this),
+                   base::Unretained(thread), base::Unretained(&event)));
+    event.Wait();
+  }
+
+  void BlinkPlatformImpl::UpdateWebThreadTLS(blink::WebThread* thread,
+                                             base::WaitableEvent* event) {
+    DCHECK(!current_thread_slot_.Get());
+    current_thread_slot_.Set(thread);
+    event->Signal();
+  }
+
+  BlinkPlatformImpl::~BlinkPlatformImpl() {
+  }
+
+  WebURLLoader* BlinkPlatformImpl::createURLLoader() {
+    ChildThreadImpl* child_thread = ChildThreadImpl::current();
+    // There may be no child thread in RenderViewTests.  These tests can still use
+    // data URLs to bypass the ResourceDispatcher.
+    return new WebURLLoaderImpl(
+        child_thread ? child_thread->resource_dispatcher() : NULL,
+        make_scoped_ptr(currentThread()->taskRunner()->clone()));
+  }
+
+  blink::WebSocketHandle* BlinkPlatformImpl::createWebSocketHandle() {
+    return new WebSocketBridge;
+  }
+
+  WebString BlinkPlatformImpl::userAgent() {
+    CR_DEFINE_STATIC_LOCAL(
+        blink::WebString, user_agent,
+        (blink::WebString::fromUTF8(GetContentClient()->GetUserAgent())));
+    DCHECK(user_agent ==
+           blink::WebString::fromUTF8(GetContentClient()->GetUserAgent()));
+    return user_agent;
+  }
+
+  WebData BlinkPlatformImpl::parseDataURL(const WebURL& url,
+                                          WebString& mimetype_out,
+                                          WebString& charset_out) {
+    std::string mime_type, char_set, data;
+    if (net::DataURL::Parse(url, &mime_type, &char_set, &data) &&
+        mime_util::IsSupportedMimeType(mime_type)) {
+      mimetype_out = WebString::fromUTF8(mime_type);
+      charset_out = WebString::fromUTF8(char_set);
+      return data;
+    }
+    return WebData();
+  }
+
+  WebURLError BlinkPlatformImpl::cancelledError(
+      const WebURL& unreachableURL) const {
+    return CreateWebURLError(unreachableURL, false, net::ERR_ABORTED);
+  }
+
+  bool BlinkPlatformImpl::isReservedIPAddress(
+      const blink::WebString& host) const {
+    net::IPAddressNumber address;
+    if (!net::ParseURLHostnameToNumber(host.utf8(), &address))
+      return false;
+    return net::IsIPAddressReserved(address);
+  }
+
+  bool BlinkPlatformImpl::portAllowed(const blink::WebURL& url) const {
+    GURL gurl = GURL(url);
+    // Return true for URLs without a port specified.  This is needed to let
+    // through non-network schemes that don't go over the network.
+    if (!gurl.has_port())
+      return true;
+    return net::IsPortAllowedForScheme(gurl.EffectiveIntPort(), gurl.scheme());
+  }
+
+  blink::WebThread* BlinkPlatformImpl::createThread(const char* name) {
+    scoped_ptr<WebThreadImplForWorkerScheduler> thread(
+        new WebThreadImplForWorkerScheduler(name));
+    thread->Init();
+    WaitUntilWebThreadTLSUpdate(thread.get());
+    return thread.release();
+  }
+
+  void BlinkPlatformImpl::SetCompositorThread(
+      scheduler::WebThreadBase* compositor_thread) {
+    compositor_thread_ = compositor_thread;
+    if (compositor_thread_)
+      WaitUntilWebThreadTLSUpdate(compositor_thread_);
+  }
+
+  blink::WebThread* BlinkPlatformImpl::currentThread() {
+    return static_cast<blink::WebThread*>(current_thread_slot_.Get());
+  }
+
+  void BlinkPlatformImpl::recordAction(const blink::UserMetricsAction& name) {
+      if (ChildThread* child_thread = ChildThread::Get())
+          child_thread->RecordComputedAction(name.action());
+  }
+
+  void BlinkPlatformImpl::registerMemoryDumpProvider(
+      blink::WebMemoryDumpProvider* wmdp, const char* name) {
+    WebMemoryDumpProviderAdapter* wmdp_adapter =
+        new WebMemoryDumpProviderAdapter(wmdp);
+    bool did_insert =
+        memory_dump_providers_.add(wmdp, make_scoped_ptr(wmdp_adapter)).second;
+    if (!did_insert)
+      return;
+    wmdp_adapter->set_is_registered(true);
+    base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
+        wmdp_adapter, name, base::ThreadTaskRunnerHandle::Get());
+  }
+
+  void BlinkPlatformImpl::unregisterMemoryDumpProvider(
+      blink::WebMemoryDumpProvider* wmdp) {
+    scoped_ptr<WebMemoryDumpProviderAdapter> wmdp_adapter =
+        memory_dump_providers_.take_and_erase(wmdp);
+    if (!wmdp_adapter)
+      return;
+    base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
+        wmdp_adapter.get());
+    wmdp_adapter->set_is_registered(false);
+  }
+
+  blink::WebProcessMemoryDump* BlinkPlatformImpl::createProcessMemoryDump() {
+    return new WebProcessMemoryDumpImpl();
+  }
 
 blink::Platform::WebMemoryAllocatorDumpGuid
 BlinkPlatformImpl::createWebMemoryAllocatorDumpGuid(
     const blink::WebString& guidStr) {
   return base::trace_event::MemoryAllocatorDumpGuid(guidStr.utf8()).ToUint64();
 }
 
 void BlinkPlatformImpl::addTraceLogEnabledStateObserver(
     TraceLogEnabledStateObserver* observer) {
   TraceLogObserverAdapter* adapter = new TraceLogObserverAdapter(observer);
@@ skipping 514 matching lines @@
   return WebString::fromUTF8(ui::KeycodeConverter::DomKeyToKeyString(
       static_cast<ui::DomKey>(dom_key)));
 }
 
 int BlinkPlatformImpl::domKeyEnumFromString(const WebString& key_string) {
   return static_cast<int>(
       ui::KeycodeConverter::KeyStringToDomKey(key_string.utf8()));
 }
 
 }  // namespace content