[Android] Implement asynchronous zero-copy bitmap capture API.

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 0b46d7f44aea4678e3dfffb3653aef83d410e908..992256750af6ceb6cb623cd9fd85505053ac2dca 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -197,7 +197,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
       const gfx::Rect& src_subrect,
       const gfx::Size& dst_size,
       const base::Callback<void(bool, const SkBitmap&)>& callback,
-      const SkBitmap::Config config) OVERRIDE;
+      const SkBitmap::Config config,
+      scoped_ptr<SkBitmap> bitmap) OVERRIDE;
   virtual void CopyFromCompositingSurfaceToVideoFrame(
       const gfx::Rect& src_subrect,
       const scoped_refptr<media::VideoFrame>& target,