Set content opacity of DFHAndroid surfacelayer based on renderer frame contents.

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 223 matching lines @@
   bool HasValidFrame() const;
 
   void MoveCaret(const gfx::Point& point);
   void DismissTextHandles();
   void SetTextHandlesTemporarilyHidden(bool hidden);
   void OnShowingPastePopup(const gfx::PointF& point);
   void OnShowUnhandledTapUIIfNeeded(int x_dip, int y_dip);
 
   void SynchronousFrameMetadata(cc::CompositorFrameMetadata frame_metadata);
 
-  void SetOverlayVideoMode(bool enabled);
-
   static void OnContextLost();
 
  private:
   void RunAckCallbacks();
 
   void CheckOutputSurfaceChanged(uint32_t output_surface_id);
   void SubmitCompositorFrame(cc::CompositorFrame frame_data);
   void SendReclaimCompositorResources(uint32_t output_surface_id,
                                       bool is_swap_ack);
 
-  void OnFrameMetadataUpdated(
-      const cc::CompositorFrameMetadata& frame_metadata);
+  void OnFrameMetadataUpdated(const cc::CompositorFrameMetadata& frame_metadata,
+                              bool is_transparent);
 
   void ShowInternal();
   void HideInternal();
   void AttachLayers();
   void RemoveLayers();
 
   void UpdateBackgroundColor(SkColor color);
 
   // Called after async screenshot task completes. Scales and crops the result
   // of the copy.
@@ skipping 116 matching lines @@
   gfx::Vector2dF last_scroll_offset_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAndroid> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_