[exp] cc: Introduce cc::CompositorMutator.

cc/trees/layer_tree_host_impl.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_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 32 matching lines @@
 #include "ui/gfx/geometry/rect.h"
 
 namespace gfx {
 class ScrollOffset;
 }
 
 namespace cc {
 
 class CompletionEvent;
 class CompositorFrameMetadata;
+class CompositorMutator;
 class DebugRectHistory;
 class EvictionTilePriorityQueue;
 class FrameRateCounter;
 class LayerImpl;
 class LayerTreeImpl;
 class MemoryHistory;
 class PageScaleAnimation;
 class PaintTimeCounter;
 class PictureLayerImpl;
 class RasterTilePriorityQueue;
@@ skipping 72 matching lines @@
       public ScrollbarAnimationControllerClient,
       public base::SupportsWeakPtr<LayerTreeHostImpl> {
  public:
   static scoped_ptr<LayerTreeHostImpl> Create(
       const LayerTreeSettings& settings,
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       SharedBitmapManager* shared_bitmap_manager,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
+      CompositorMutator* compositor_mutator,
       int id);
   ~LayerTreeHostImpl() override;
 
   // InputHandler implementation
   void BindToClient(InputHandlerClient* client) override;
   InputHandler::ScrollStatus ScrollBegin(
       const gfx::Point& viewport_point,
       InputHandler::ScrollInputType type) override;
   InputHandler::ScrollStatus ScrollAnimated(
       const gfx::Point& viewport_point,
@@ skipping 51 matching lines @@
 
     // RenderPassSink implementation.
     void AppendRenderPass(scoped_ptr<RenderPass> render_pass) override;
   };
 
   virtual void BeginMainFrameAborted(CommitEarlyOutReason reason);
   virtual void BeginCommit();
   virtual void CommitComplete();
   virtual void Animate(base::TimeTicks monotonic_time);
   virtual void UpdateAnimationState(bool start_ready_animations);
+  void ApplyCustomMutations(base::TimeTicks monotinic_time);
   void ActivateAnimations();
   void MainThreadHasStoppedFlinging();
   void DidAnimateScrollOffset();
   void SetViewportDamage(const gfx::Rect& damage_rect);
 
   virtual void PrepareTiles();
 
   // Returns DRAW_SUCCESS unless problems occured preparing the frame, and we
   // should try to avoid displaying the frame. If PrepareToDraw is called,
   // DidDrawAllLayers must also be called, regardless of whether DrawLayers is
@@ skipping 298 matching lines @@
   }
 
  protected:
   LayerTreeHostImpl(
       const LayerTreeSettings& settings,
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       SharedBitmapManager* shared_bitmap_manager,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
+      CompositorMutator* compositor_mutator,
       int id);
 
-
   // Virtual for testing.
   virtual void AnimateLayers(base::TimeTicks monotonic_time);
 
   LayerTreeHostImplClient* client_;
   Proxy* proxy_;
 
  private:
   void CreateAndSetRenderer();
   void CreateAndSetTileManager();
   void DestroyTileManager();
@@ skipping 177 matching lines @@
 
   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
   MicroBenchmarkControllerImpl micro_benchmark_controller_;
   scoped_ptr<TaskGraphRunner> single_thread_synchronous_task_graph_runner_;
 
   // Optional callback to notify of new tree activations.
   base::Closure tree_activation_callback_;
 
   SharedBitmapManager* shared_bitmap_manager_;
   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
+
+  CompositorMutator* compositor_mutator_;
+
   int id_;
 
   std::set<SwapPromiseMonitor*> swap_promise_monitor_;
   std::vector<PictureLayerImpl::Pair> picture_layer_pairs_;
 
   bool requires_high_res_to_draw_;
   bool is_likely_to_require_a_draw_;
 
   scoped_ptr<FrameTimingTracker> frame_timing_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_