cc: Setup API to release OutputSurface from LTHClient.

content/renderer/gpu/render_widget_compositor.h

 // Copyright (c) 2013 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_RENDERER_GPU_RENDER_WIDGET_COMPOSITOR_H_
 #define CONTENT_RENDERER_GPU_RENDER_WIDGET_COMPOSITOR_H_
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
@@ skipping 60 matching lines @@
   void SetNeedsCommit();
   void NotifyInputThrottledUntilCommit();
   const cc::Layer* GetRootLayer() const;
   int ScheduleMicroBenchmark(
       const std::string& name,
       scoped_ptr<base::Value> value,
       const base::Callback<void(scoped_ptr<base::Value>)>& callback);
   bool SendMessageToMicroBenchmark(int id, scoped_ptr<base::Value> value);
   void StartCompositor();
   void SetSurfaceIdNamespace(uint32_t surface_id_namespace);
+  scoped_ptr<cc::OutputSurface> GiveBackOutputSurface();

[no sievers, 2015/09/10 00:00:22]

Can you remove the changes to RenderWidgetCompositor? Since the API is unused
here and we have no immediate plan to use it in the renderer.

[sohanjg, 2015/09/10 15:07:23]

Done.

 
   // WebLayerTreeView implementation.
   virtual void setRootLayer(const blink::WebLayer& layer);
   virtual void clearRootLayer();
   virtual void attachCompositorAnimationTimeline(
       blink::WebCompositorAnimationTimeline* compositor_timeline);
   virtual void detachCompositorAnimationTimeline(
       blink::WebCompositorAnimationTimeline* compositor_timeline);
   virtual void setViewportSize(
       const blink::WebSize& unused_deprecated,
@@ skipping 95 matching lines @@
   bool CompositeIsSynchronous() const;
   void SynchronouslyComposite();
 
   int num_failed_recreate_attempts_;
   RenderWidget* widget_;
   CompositorDependencies* compositor_deps_;
   scoped_ptr<cc::LayerTreeHost> layer_tree_host_;
 
   blink::WebLayoutAndPaintAsyncCallback* layout_and_paint_async_callback_;
   scoped_ptr<cc::CopyOutputRequest> temporary_copy_output_request_;
+  bool did_give_back_output_surface_;
 
   base::WeakPtrFactory<RenderWidgetCompositor> weak_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_RENDER_WIDGET_COMPOSITOR_H_