cc: Add best_record_time to rendering stats.

cc/debug/rendering_stats.h

 // Copyright 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 CC_DEBUG_RENDERING_STATS_H_
 #define CC_DEBUG_RENDERING_STATS_H_
 
 #include "base/basictypes.h"
 #include "base/time/time.h"
 #include "cc/base/cc_export.h"
@@ skipping 18 matching lines @@
 };
 
 struct CC_EXPORT MainThreadRenderingStats {
   // Note: when adding new members, please remember to update EnumerateFields
   // and Add in rendering_stats.cc.
 
   int64 animation_frame_count;
   int64 screen_frame_count;
   base::TimeDelta paint_time;
   base::TimeDelta record_time;
+  base::TimeDelta best_record_time;
   base::TimeDelta commit_time;
   int64 commit_count;
   int64 painted_pixel_count;
   int64 recorded_pixel_count;
   int64 image_gathering_count;
   base::TimeDelta image_gathering_time;
 
   MainThreadRenderingStats();
   void IssueTraceEvent() const;
   scoped_ptr<base::debug::ConvertableToTraceFormat> AsTraceableData() const;
@@ skipping 36 matching lines @@
   // Outputs the fields in this structure to the provided enumerator.
   void EnumerateFields(Enumerator* enumerator) const;
 
   // Add fields of |other| to the fields in this structure.
   void Add(const RenderingStats& other);
 };
 
 }  // namespace cc
 
 #endif  // CC_DEBUG_RENDERING_STATS_H_