cc: Setup API to release OutputSurface from LTHClient.

cc/trees/thread_proxy.h

 // Copyright 2011 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 CC_TREES_THREAD_PROXY_H_
 #define CC_TREES_THREAD_PROXY_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 160 matching lines @@
   bool BeginMainFrameRequested() const override;
   void MainThreadHasStoppedFlinging() override;
   void Start() override;
   void Stop() override;
   void ForceSerializeOnSwapBuffers() override;
   bool SupportsImplScrolling() const override;
   void SetDebugState(const LayerTreeDebugState& debug_state) override;
   bool MainFrameWillHappenForTesting() override;
   void SetChildrenNeedBeginFrames(bool children_need_begin_frames) override;
   void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval) override;
+  scoped_ptr<OutputSurface> ReleaseOutputSurface() override;
 
   // LayerTreeHostImplClient implementation
   void UpdateRendererCapabilitiesOnImplThread() override;
   void DidLoseOutputSurfaceOnImplThread() override;
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override;
   void SetEstimatedParentDrawTime(base::TimeDelta draw_time) override;
   void SetMaxSwapsPendingOnImplThread(int max) override;
   void DidSwapBuffersOnImplThread() override;
   void DidSwapBuffersCompleteOnImplThread() override;
@@ skipping 77 matching lines @@
   void InitializeImplOnImplThread(CompletionEvent* completion);
   void SetLayerTreeHostClientReadyOnImplThread();
   void SetVisibleOnImplThread(CompletionEvent* completion, bool visible);
   void SetThrottleFrameProductionOnImplThread(bool throttle);
   void HasInitializedOutputSurfaceOnImplThread(
       CompletionEvent* completion,
       bool* has_initialized_output_surface);
   void DeleteContentsTexturesOnImplThread(CompletionEvent* completion);
   void InitializeOutputSurfaceOnImplThread(
       scoped_ptr<OutputSurface> output_surface);
+  void ReleaseOutputSurfaceOnImplThread(CompletionEvent* completion);
   void FinishGLOnImplThread(CompletionEvent* completion);
   void LayerTreeHostClosedOnImplThread(CompletionEvent* completion);
   DrawResult DrawSwapInternal(bool forced_draw);
   void ForceSerializeOnSwapBuffersOnImplThread(CompletionEvent* completion);
   void MainFrameWillHappenOnImplThreadForTesting(CompletionEvent* completion,
                                                  bool* main_frame_will_happen);
   void SetSwapUsedIncompleteTileOnImplThread(bool used_incomplete_tile);
   void MainThreadHasStoppedFlingingOnImplThread();
   void SetInputThrottledUntilCommitOnImplThread(bool is_throttled);
   void SetDebugStateOnImplThread(const LayerTreeDebugState& debug_state);
@@ skipping 10 matching lines @@
   MainThreadOnly& main();
 
   // Use accessors instead of this variable directly.
   MainThreadOrBlockedMainThread main_thread_or_blocked_vars_unsafe_;
   MainThreadOrBlockedMainThread& blocked_main();
 
   // Use accessors instead of this variable directly.
   CompositorThreadOnly compositor_thread_vars_unsafe_;
   CompositorThreadOnly& impl();
 
+  scoped_ptr<cc::OutputSurface> output_surface_;
+
   base::WeakPtr<ThreadProxy> main_thread_weak_ptr_;
   base::WeakPtr<ThreadProxy> impl_thread_weak_ptr_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadProxy);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_THREAD_PROXY_H_