Make ui::Snapshot asynchronous on Android, remove CompositeAndReadback.

content/browser/renderer_host/compositor_impl_android.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/containers/scoped_ptr_hash_map.h"
@@ skipping 82 matching lines @@
   virtual void ScheduleComposite() OVERRIDE;
   virtual void ScheduleAnimation() OVERRIDE;
   virtual void DidPostSwapBuffers() OVERRIDE;
   virtual void DidAbortSwapBuffers() OVERRIDE;
 
   // ImageTransportFactoryAndroidObserver implementation.
   virtual void OnLostResources() OVERRIDE;
 
   // WindowAndroidCompositor implementation.
   virtual void AttachLayerForReadback(scoped_refptr<cc::Layer> layer) OVERRIDE;
+  virtual void RequestCopyOfOutputOnRootLayer(
+      scoped_ptr<cc::CopyOutputRequest> request) OVERRIDE;
   virtual void OnVSync(base::TimeTicks frame_time,
                        base::TimeDelta vsync_period) OVERRIDE;
 
   void PostComposite(base::TimeDelta delay);
   enum CompositingTrigger {
     COMPOSITE_IMMEDIATELY,
     COMPOSITE_ON_VSYNC
   };
   void Composite(CompositingTrigger trigger);
   cc::UIResourceId GenerateUIResourceFromUIResourceBitmap(
@@ skipping 43 matching lines @@
   base::TimeDelta vsync_period_;
 
   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_