cc: Switch RenderingStats collection in Layer::Update() to RenderingStatsInstrumentation

cc/debug/rendering_stats_instrumentation.h

 // Copyright 2013 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_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_
 #define CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "cc/debug/rendering_stats.h"
@@ skipping 14 matching lines @@
   // it's value during runtime.
   bool record_rendering_stats() const { return record_rendering_stats_; }
   void set_record_rendering_stats(bool record_rendering_stats) {
     if (record_rendering_stats_ != record_rendering_stats)
       record_rendering_stats_ = record_rendering_stats;
   }
 
   base::TimeTicks StartRecording() const;
   base::TimeDelta EndRecording(base::TimeTicks start_time) const;
 
-  // TODO(egraether): Remove after switching Layer::update() to use this class.
-  // Used in LayerTreeHost::paintLayerContents().
-  void AddStats(const RenderingStats& other);
-
   void IncrementAnimationFrameCount();
   void SetScreenFrameCount(int64 count);
   void SetDroppedFrameCount(int64 count);
 
   void AddCommit(base::TimeDelta duration);
   void AddPaint(base::TimeDelta duration, int64 pixels);
   void AddRaster(base::TimeDelta duration,
                  int64 pixels,
                  bool is_in_pending_tree_now_bin);
 
@@ skipping 16 matching lines @@
   bool record_rendering_stats_;
 
   base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderingStatsInstrumentation);
 };
 
 }  // namespace cc
 
 #endif  // CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_