Add resize gutter layers to DelegatedFrameHost

content/browser/compositor/delegated_frame_host.h

 // Copyright 2014 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_COMPOSITOR_DELEGATED_FRAME_HOST_H_
 #define CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 184 matching lines @@
 
   bool ShouldSkipFrame(gfx::Size size_in_dip) const;
 
   // Lazily grab a resize lock if the aura window size doesn't match the current
   // frame size, to give time to the renderer.
   void MaybeCreateResizeLock();
 
   // Checks if the resize lock can be released because we received an new frame.
   void CheckResizeLock();
 
+  // Update the layers for the resize gutters to the right and bottom of the
+  // surface layer.
+  void UpdateGutters();
+
   // Called after async thumbnailer task completes.  Scales and crops the result
   // of the copy.
   static void CopyFromCompositingSurfaceHasResultForVideo(
       base::WeakPtr<DelegatedFrameHost> rwhva,
       scoped_refptr<OwnedMailbox> subscriber_texture,
       scoped_refptr<media::VideoFrame> video_frame,
       const base::Callback<void(const gfx::Rect&, bool)>& callback,
       scoped_ptr<cc::CopyOutputResult> result);
   static void CopyFromCompositingSurfaceFinishedForVideo(
       base::WeakPtr<DelegatedFrameHost> rwhva,
@@ skipping 35 matching lines @@
 
   // The number of delegated frame acks that are pending, to delay resource
   // returns until the acks are sent.
   int pending_delegated_ack_count_;
 
   // True after a delegated frame has been skipped, until a frame is not
   // skipped.
   bool skipped_frames_;
   std::vector<ui::LatencyInfo> skipped_latency_info_list_;
 
+  scoped_ptr<ui::Layer> right_gutter_;
+  scoped_ptr<ui::Layer> bottom_gutter_;
+
+  // This is the last root background color from a swapped frame.
+  SkColor background_color_;
+
   // State for rendering into a Surface.
   scoped_ptr<cc::SurfaceIdAllocator> id_allocator_;
   scoped_ptr<cc::SurfaceFactory> surface_factory_;
   cc::SurfaceId surface_id_;
   gfx::Size current_surface_size_;
   float current_scale_factor_;
   cc::ReturnedResourceArray surface_returned_resources_;
 
   // This lock is the one waiting for a frame of the right size to come back
   // from the renderer/GPU process. It is set from the moment the aura window
@@ skipping 36 matching lines @@
       yuv_readback_pipeline_;
 
   scoped_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 
   cc::BeginFrameSource* begin_frame_source_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_