Enqueuing new frames in a Surface should cause Displays to reaggregate it

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 "cc/layers/delegated_frame_provider.h"
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/output/copy_output_result.h"
@@ skipping 246 matching lines @@
   // Provides delegated frame updates to the cc::DelegatedRendererLayer.
   scoped_refptr<cc::DelegatedFrameProvider> frame_provider_;
 
   // 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_;
   cc::ReturnedResourceArray surface_returned_resources_;
 
+  // These Surfaces will be destroyed after the compositor commits and draws
+  // its next frame.
+  std::vector<cc::SurfaceId> surfaces_to_destroy_after_commit_;
+
+  // These Surfaces will be destroyed after the compositor draws its next
+  // frame.
+  std::vector<cc::SurfaceId> surfaces_to_destroy_after_swap_;
+
   // 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
   // got resized, to the moment we committed the renderer frame of the same
   // size. It keeps track of the size we expect from the renderer, and locks the
   // compositor, as well as the UI for a short time to give a chance to the
   // renderer of producing a frame of the right size.
   scoped_ptr<ResizeLock> resize_lock_;
 
   // Keeps track of the current frame size.
   gfx::Size current_frame_size_in_dip_;
@@ skipping 21 matching lines @@
   // YUV readback pipeline.
   scoped_ptr<content::ReadbackYUVInterface>
       yuv_readback_pipeline_;
 
   scoped_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_