color: Add ColorCanvasExtensions runtime flag

third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h

 /*
  * Copyright (C) 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 75 matching lines @@
 
   static ContextType ContextTypeFromId(const String& id);
   static ContextType ResolveContextTypeAliases(ContextType);
 
   CanvasRenderingContextHost* host() const { return host_; }
 
   WTF::String ColorSpaceAsString() const;
   WTF::String PixelFormatAsString() const;
 
   const CanvasColorParams& color_params() const { return color_params_; }
-  ColorBehavior ColorBehaviorForMediaDrawnToCanvas() const;
 
   virtual PassRefPtr<Image> GetImage(AccelerationHint,
                                      SnapshotReason) const = 0;
   virtual ImageData* ToImageData(SnapshotReason reason) { return nullptr; }
   virtual ContextType GetContextType() const = 0;
   virtual bool IsComposited() const = 0;
   virtual bool IsAccelerated() const = 0;
   virtual bool ShouldAntialias() const { return false; }
   virtual void SetIsHidden(bool) = 0;
   virtual bool isContextLost() const { return true; }
@@ skipping 100 matching lines @@
   HashSet<String> clean_urls_;
   HashSet<String> dirty_urls_;
   CanvasColorParams color_params_;
   CanvasContextCreationAttributes creation_attributes_;
   bool finalize_frame_scheduled_ = false;
 };
 
 }  // namespace blink
 
 #endif