cc: Move main thread hierarchy dependencies into PropertyTreeBuilder

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 131 matching lines @@
   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();
 
   LayerListIterator<Layer> begin();
   LayerListIterator<Layer> end();
+  const LayerListIterator<Layer> begin() const;
+  const LayerListIterator<Layer> end() const;
   LayerListReverseIterator<Layer> rbegin();
   LayerListReverseIterator<Layer> rend();
 
   // Called when the compositor completed page scale animation.
   void DidCompletePageScaleAnimation();
 
   LayerTreeHostClient* client() { return client_; }
   const base::WeakPtr<InputHandler>& GetInputHandler() {
     return input_handler_weak_ptr_;
   }
 
   void NotifyInputThrottledUntilCommit();
 
   void LayoutAndUpdateLayers();
   void Composite(base::TimeTicks frame_begin_time);
 
   void FinishAllRendering();
 
   void SetDeferCommits(bool defer_commits);
 
   int source_frame_number() const { return source_frame_number_; }
 
-  int meta_information_sequence_number() {
-    return meta_information_sequence_number_;
-  }
-
   bool gpu_rasterization_histogram_recorded() const {
     return gpu_rasterization_histogram_recorded_;
   }
 
-  void IncrementMetaInformationSequenceNumber() {
-    meta_information_sequence_number_++;
-  }
-
   void SetNeedsDisplayOnAllLayers();
 
   void SetOutputIsSecure(bool output_is_secure);
 
   void CollectRenderingStats(RenderingStats* stats) const;
 
   RenderingStatsInstrumentation* rendering_stats_instrumentation() const {
     return rendering_stats_instrumentation_.get();
   }
 
@@ skipping 307 matching lines @@
   const CompositorMode compositor_mode_;
 
   bool needs_full_tree_sync_;
   bool needs_meta_info_recomputation_;
 
   LayerTreeHostClient* client_;
   std::unique_ptr<Proxy> proxy_;
   std::unique_ptr<TaskRunnerProvider> task_runner_provider_;
 
   int source_frame_number_;
-  int meta_information_sequence_number_;
   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_;
@@ skipping 69 matching lines @@
 
   uint32_t surface_id_namespace_;
   uint32_t next_surface_sequence_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_