Query the preferred readback config in CopyFromBackingStore

content/browser/renderer_host/render_widget_host_view_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_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include <map>
 #include <queue>
 
@@ skipping 183 matching lines @@
   virtual void OnCompositingDidCommit() OVERRIDE;
   virtual void OnAttachCompositor() OVERRIDE {}
   virtual void OnDetachCompositor() OVERRIDE;
 
   // ImageTransportFactoryAndroidObserver implementation.
   virtual void OnLostResources() OVERRIDE;
 
   // DelegatedFrameEvictor implementation
   virtual void EvictDelegatedFrame() OVERRIDE;
 
+  virtual SkBitmap::Config PreferredReadbackFormat() OVERRIDE;
+
   // Non-virtual methods
   void SetContentViewCore(ContentViewCoreImpl* content_view_core);
   SkColor GetCachedBackgroundColor() const;
   void SendKeyEvent(const NativeWebKeyboardEvent& event);
   void SendTouchEvent(const blink::WebTouchEvent& event);
   void SendMouseEvent(const blink::WebMouseEvent& event);
   void SendMouseWheelEvent(const blink::WebMouseWheelEvent& event);
   void SendGestureEvent(const blink::WebGestureEvent& event);
   void SendBeginFrame(const cc::BeginFrameArgs& args);
 
@@ skipping 144 matching lines @@
   scoped_ptr<DelegatedFrameEvictor> frame_evictor_;
 
   bool using_delegated_renderer_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_