Remove CompositorObserver::OnCompositingEnded()

ui/compositor/compositor.h

 // Copyright (c) 2012 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 UI_COMPOSITOR_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 367 matching lines @@
 
   const cc::LayerTreeDebugState& GetLayerTreeDebugState() const;
   void SetLayerTreeDebugState(const cc::LayerTreeDebugState& debug_state);
   const cc::RendererSettings& GetRendererSettings() const;
 
   LayerAnimatorCollection* layer_animator_collection() {
     return &layer_animator_collection_;
   }
 
   const cc::FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
-  int committed_frame_number() const { return committed_frame_number_; }
+  int activated_frame_count() const { return activated_frame_count_; }
   float refresh_rate() const { return refresh_rate_; }
 
  private:
   friend class base::RefCounted<Compositor>;
   friend class CompositorLock;
 
   // Called by CompositorLock.
   void UnlockCompositor();
 
   // Called to release any pending CompositorLock
   void CancelCompositorLock();
 
   gfx::Size size_;
 
   ui::ContextFactory* context_factory_;
   ui::ContextFactoryPrivate* context_factory_private_;
 
   // The root of the Layer tree drawn by this compositor.
   Layer* root_layer_;
 
   base::ObserverList<CompositorObserver, true> observer_list_;
   base::ObserverList<CompositorAnimationObserver> animation_observer_list_;
 
   gfx::AcceleratedWidget widget_;
   // A sequence number of a current compositor frame for use with metrics.
-  int committed_frame_number_;
+  int activated_frame_count_;
 
   // current VSYNC refresh rate per second.
   float refresh_rate_;
 
   // A map from child id to parent id.
   std::unordered_set<cc::FrameSinkId, cc::FrameSinkIdHash> child_frame_sinks_;
   bool widget_valid_;
   bool compositor_frame_sink_requested_;
   const cc::FrameSinkId frame_sink_id_;
   scoped_refptr<cc::Layer> root_web_layer_;
@@ skipping 19 matching lines @@
   gfx::ColorSpace blending_color_space_;
 
   base::WeakPtrFactory<Compositor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_