Implement the infrastructure of creating WorkerFetchContext in worker global scope.

third_party/WebKit/Source/web/WebRuntimeFeatures.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 184 matching lines @@
 }
 
 void WebRuntimeFeatures::EnableNavigatorContentUtils(bool enable) {
   RuntimeEnabledFeatures::setNavigatorContentUtilsEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableNetworkInformation(bool enable) {
   RuntimeEnabledFeatures::setNetworkInformationEnabled(enable);
 }
 
+void WebRuntimeFeatures::EnableOffMainThreadFetch(bool enable) {
+  RuntimeEnabledFeatures::setOffMainThreadFetchEnabled(enable);
+}
+
 void WebRuntimeFeatures::EnableOnDeviceChange(bool enable) {
   RuntimeEnabledFeatures::setOnDeviceChangeEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableOrientationEvent(bool enable) {
   RuntimeEnabledFeatures::setOrientationEventEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableOriginTrials(bool enable) {
   RuntimeEnabledFeatures::setOriginTrialsEnabled(enable);
@@ skipping 179 matching lines @@
 
 void WebRuntimeFeatures::EnableVideoFullscreenDetection(bool enable) {
   RuntimeEnabledFeatures::setVideoFullscreenDetectionEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableMediaControlsOverlayPlayButton(bool enable) {
   RuntimeEnabledFeatures::setMediaControlsOverlayPlayButtonEnabled(enable);
 }
 
 }  // namespace blink