android: add Java-side support for browser compositor async readback

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 45 matching lines @@
 
  private:
   // Compositor implementation.
   virtual void SetRootLayer(scoped_refptr<cc::Layer> root) OVERRIDE;
   virtual void SetWindowSurface(ANativeWindow* window) OVERRIDE;
   virtual void SetSurface(jobject surface) OVERRIDE;
   virtual void SetVisible(bool visible) OVERRIDE;
   virtual void setDeviceScaleFactor(float factor) OVERRIDE;
   virtual void SetWindowBounds(const gfx::Size& size) OVERRIDE;
   virtual void SetHasTransparentBackground(bool flag) OVERRIDE;
-  virtual bool CompositeAndReadback(
-      void *pixels, const gfx::Rect& rect) OVERRIDE;
   virtual void SetNeedsComposite() OVERRIDE;
   virtual cc::UIResourceId GenerateUIResource(const SkBitmap& bitmap,
                                               bool is_transient) OVERRIDE;
   virtual cc::UIResourceId GenerateCompressedUIResource(const gfx::Size& size,
                                                         void* pixels,
                                                         bool is_transient)
       OVERRIDE;
   virtual void DeleteUIResource(cc::UIResourceId resource_id) OVERRIDE;
 
   // LayerTreeHostClient implementation.
@@ skipping 80 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_