Fix HTML5 video blurry

cc/resources/video_resource_updater.h

 // Copyright 2013 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.
 
 #ifndef CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
 #define CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 85 matching lines @@
     // in the 0-1 range, you need to do:
     //   (half_float - Offset()) * Multiplier()
     // to each returned value.
     virtual float Offset() const = 0;
     virtual float Multiplier() const = 0;
   };
 
   static std::unique_ptr<HalfFloatMaker> NewHalfFloatMaker(
       int bits_per_channel);
 
+  ResourceFormat YuvResourceFormat(int bits) const;
+
  private:
   class PlaneResource {
    public:
     PlaneResource(unsigned resource_id,
                   const gfx::Size& resource_size,
                   ResourceFormat resource_format,
                   gpu::Mailbox mailbox);
     PlaneResource(const PlaneResource& other);
 
     // Returns true if this resource matches the unique identifiers of another
@@ skipping 87 matching lines @@
   // Recycle resources so that we can reduce the number of allocations and
   // data transfers.
   ResourceList all_resources_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoResourceUpdater);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_