Fixing flakiness of TextureLayerChangeInvisibleMailboxTest

cc/trees/single_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_SINGLE_THREAD_PROXY_H_
 #define CC_TREES_SINGLE_THREAD_PROXY_H_
 
 #include <limits>
 
 #include "base/cancelable_callback.h"
@@ skipping 104 matching lines @@
   void DoPainting();
   void DoCommit();
   DrawResult DoComposite(LayerTreeHostImpl::FrameData* frame);
   void DoSwap();
   void DidCommitAndDrawFrame();
   void CommitComplete();
 
   bool ShouldComposite() const;
   void ScheduleRequestNewCompositorFrameSink();
 
+  void DidReceiveCompositorFrameAck();
+
   // Accessed on main thread only.
   LayerTreeHost* layer_tree_host_;
   LayerTreeHostSingleThreadClient* single_thread_client_;
 
   TaskRunnerProvider* task_runner_provider_;
 
   // Used on the Thread, but checked on main thread during
   // initialization/shutdown.
   std::unique_ptr<LayerTreeHostImpl> layer_tree_host_impl_;
 
@@ skipping 16 matching lines @@
   // True if a request to the LayerTreeHostClient to create an output surface
   // is still outstanding.
   bool compositor_frame_sink_creation_requested_;
   // When output surface is lost, is set to true until a new output surface is
   // initialized.
   bool compositor_frame_sink_lost_;
 
   // This is the callback for the scheduled RequestNewCompositorFrameSink.
   base::CancelableClosure compositor_frame_sink_creation_callback_;
 
+  base::WeakPtr<SingleThreadProxy> frame_sink_bound_weak_ptr_;
+
+  // WeakPtrs generated by this factory will be invalidated when
+  // CompositorFrameSink is released.
+  base::WeakPtrFactory<SingleThreadProxy> frame_sink_bound_weak_factory_;
+
   base::WeakPtrFactory<SingleThreadProxy> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SingleThreadProxy);
 };
 
 // For use in the single-threaded case. In debug builds, it pretends that the
 // code is running on the impl thread to satisfy assertion checks.
 class DebugScopedSetImplThread {
  public:
 #if DCHECK_IS_ON()
@@ skipping 63 matching lines @@
  private:
   DebugScopedSetImplThread impl_thread_;
   DebugScopedSetMainThreadBlocked main_thread_blocked_;
 
   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetImplThreadAndMainThreadBlocked);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_SINGLE_THREAD_PROXY_H_