cc: Track BeginMainFrame more precisely in CompositorTimingHistory.

cc/scheduler/compositor_timing_history.h

 // Copyright 2014 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_SCHEDULER_COMPOSITOR_TIMING_HISTORY_H_
 #define CC_SCHEDULER_COMPOSITOR_TIMING_HISTORY_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/rolling_time_delta_history.h"
 
@@ skipping 16 matching lines @@
   };
   class UMAReporter;
 
   CompositorTimingHistory(
       UMACategory uma_category,
       RenderingStatsInstrumentation* rendering_stats_instrumentation);
   virtual ~CompositorTimingHistory();
 
   void AsValueInto(base::trace_event::TracedValue* state) const;
 
+  // Deprecated.
   virtual base::TimeDelta BeginMainFrameToCommitDurationEstimate() const;
+
+  // The main thread responsiveness depends heavily on whether or not the
+  // on_critical_path flag is set, so we record response times separately.
+  virtual base::TimeDelta BeginMainFrameQueueDurationCriticalEstimate() const;
+  virtual base::TimeDelta BeginMainFrameQueueDurationNotCriticalEstimate()
+      const;
+  virtual base::TimeDelta BeginMainFrameStartToCommitDurationEstimate() const;
   virtual base::TimeDelta CommitToReadyToActivateDurationEstimate() const;
   virtual base::TimeDelta PrepareTilesDurationEstimate() const;
   virtual base::TimeDelta ActivateDurationEstimate() const;
   virtual base::TimeDelta DrawDurationEstimate() const;
 
   void SetRecordingEnabled(bool enabled);
 
-  void WillBeginMainFrame();
+  void WillBeginMainFrame(bool on_critical_path);
+  void BeginMainFrameStarted(base::TimeTicks main_thread_start_time);
   void BeginMainFrameAborted();
   void DidCommit();
   void WillPrepareTiles();
   void DidPrepareTiles();
   void ReadyToActivate();
   void WillActivate();
   void DidActivate();
   void WillDraw();
   void DidDraw();
 
  protected:
   static scoped_ptr<UMAReporter> CreateUMAReporter(UMACategory category);
   virtual base::TimeTicks Now() const;
 
   bool enabled_;
 
-  RollingTimeDeltaHistory begin_main_frame_to_commit_duration_history_;
+  RollingTimeDeltaHistory begin_main_frame_sent_to_commit_duration_history_;
+  RollingTimeDeltaHistory begin_main_frame_queue_duration_critical_history_;
+  RollingTimeDeltaHistory begin_main_frame_queue_duration_not_critical_history_;
+  RollingTimeDeltaHistory begin_main_frame_start_to_commit_duration_history_;
   RollingTimeDeltaHistory commit_to_ready_to_activate_duration_history_;
   RollingTimeDeltaHistory prepare_tiles_duration_history_;
   RollingTimeDeltaHistory activate_duration_history_;
   RollingTimeDeltaHistory draw_duration_history_;
 
+  bool begin_main_frame_on_critical_path_;
   base::TimeTicks begin_main_frame_sent_time_;
+  base::TimeTicks begin_main_frame_start_time_;
   base::TimeTicks commit_time_;
   base::TimeTicks start_prepare_tiles_time_;
   base::TimeTicks start_activate_time_;
   base::TimeTicks start_draw_time_;
 
   scoped_ptr<UMAReporter> uma_reporter_;
   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CompositorTimingHistory);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_COMPOSITOR_TIMING_HISTORY_H_