cc: Get rid of LayerTreeHost::output_surface_lost_ state.

cc/trees/layer_tree_host.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_LAYER_TREE_HOST_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 127 matching lines @@
   void WillCommit();
   void CommitComplete();
   void SetOutputSurface(std::unique_ptr<OutputSurface> output_surface);
   std::unique_ptr<OutputSurface> ReleaseOutputSurface();
   void RequestNewOutputSurface();
   void DidInitializeOutputSurface();
   void DidFailToInitializeOutputSurface();
   virtual std::unique_ptr<LayerTreeHostImpl> CreateLayerTreeHostImpl(
       LayerTreeHostImplClient* client);
   void DidLoseOutputSurface();
-  bool output_surface_lost() const { return output_surface_lost_; }
   void DidCommitAndDrawFrame() { client_->DidCommitAndDrawFrame(); }
   void DidCompleteSwapBuffers() { client_->DidCompleteSwapBuffers(); }
   bool UpdateLayers();
   // Called when the compositor completed page scale animation.
   void DidCompletePageScaleAnimation();
 
   LayerTreeHostClient* client() { return client_; }
   const base::WeakPtr<InputHandler>& GetInputHandler() {
     return input_handler_weak_ptr_;
   }
@@ skipping 51 matching lines @@
   void UpdateTopControlsState(TopControlsState constraints,
                               TopControlsState current,
                               bool animate);
 
   Proxy* proxy() const { return proxy_.get(); }
   TaskRunnerProvider* task_runner_provider() const {
     return task_runner_provider_.get();
   }
   AnimationHost* animation_host() const;
 
-  bool has_output_surface() const { return !!current_output_surface_; }
-
   // CreateUIResource creates a resource given a bitmap.  The bitmap is
   // generated via an interface function, which is called when initializing the
   // resource and when the resource has been lost (due to lost context).  The
   // parameter of the interface is a single boolean, which indicates whether the
   // resource has been lost or not.  CreateUIResource returns an Id of the
   // resource, which is always positive.
   virtual UIResourceId CreateUIResource(UIResourceClient* client);
   // Deletes a UI resource.  May safely be called more than once.
   virtual void DeleteUIResource(UIResourceId id);
   // Put the recreation of all UI resources into the resource queue after they
@@ skipping 88 matching lines @@
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner);
   void InitializeRemoteClient(
       RemoteProtoChannel* remote_proto_channel,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner);
   void InitializeForTesting(
       std::unique_ptr<TaskRunnerProvider> task_runner_provider,
       std::unique_ptr<Proxy> proxy_for_testing,
       std::unique_ptr<BeginFrameSource> external_begin_frame_source);
   void InitializePictureCacheForTesting();
-  void SetOutputSurfaceLostForTesting(bool is_lost) {
-    output_surface_lost_ = is_lost;
-  }
   void SetTaskRunnerProviderForTesting(
       std::unique_ptr<TaskRunnerProvider> task_runner_provider);
 
   // shared_bitmap_manager(), gpu_memory_buffer_manager(), and
   // task_graph_runner() return valid values only until the LayerTreeHostImpl is
   // created in CreateLayerTreeHostImpl().
   SharedBitmapManager* shared_bitmap_manager() const {
     return shared_bitmap_manager_;
   }
   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager() const {
@@ skipping 57 matching lines @@
   std::unique_ptr<RenderingStatsInstrumentation>
       rendering_stats_instrumentation_;
 
   // |current_output_surface_| can't be updated until we've successfully
   // initialized a new output surface. |new_output_surface_| contains the
   // new output surface that is currently being initialized. If initialization
   // is successful then |new_output_surface_| replaces
   // |current_output_surface_|.
   std::unique_ptr<OutputSurface> new_output_surface_;
   std::unique_ptr<OutputSurface> current_output_surface_;
-  bool output_surface_lost_;
 
   const LayerTreeSettings settings_;
   LayerTreeDebugState debug_state_;
 
   bool visible_;
 
   bool has_gpu_rasterization_trigger_;
   bool content_is_suitable_for_gpu_rasterization_;
   bool gpu_rasterization_histogram_recorded_;
 
@@ skipping 18 matching lines @@
   uint32_t surface_client_id_;
   uint32_t next_surface_sequence_;
   uint32_t num_consecutive_frames_suitable_for_gpu_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_