mac: Use IOSurfaces in Canvas2DLayerBridge.

third_party/WebKit/public/web/WebRuntimeFeatures.h

 /*
  * 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 41 matching lines @@
     // RuntimeEnabledFeatures.in.
     // Note: We use std::string instead of WebString because this API can
     // be called before blink::initalize(). We can't create WebString objects
     // before blink::initialize().
     BLINK_EXPORT static void enableFeatureFromString(const std::string& name, bool enable);
 
     BLINK_EXPORT static void enableApplicationCache(bool);
 
     BLINK_EXPORT static void enableAudioOutputDevices(bool);
 
+    BLINK_EXPORT static void enableCanvas2dImageChromium(bool);
+
     BLINK_EXPORT static void enableDatabase(bool);
 
     BLINK_EXPORT static void enableCompositedSelectionUpdate(bool);
     BLINK_EXPORT static bool isCompositedSelectionUpdateEnabled();
 
     BLINK_EXPORT static void enableDecodeToYUV(bool);
 
     BLINK_EXPORT static void enableDisplayList2dCanvas(bool);
     BLINK_EXPORT static void forceDisplayList2dCanvas(bool);
     BLINK_EXPORT static void forceDisable2dCanvasCopyOnWrite(bool);
@@ skipping 91 matching lines @@
     // (crbug.com/543198).
     BLINK_EXPORT static bool isServiceWorkerExtendableMessageEventEnabled();
 
 private:
     WebRuntimeFeatures();
 };
 
 } // namespace blink
 
 #endif