cc: Measure compositor timing with finer granularity

cc/scheduler/compositor_timing_history.h

Index: cc/scheduler/compositor_timing_history.h
diff --git a/cc/scheduler/compositor_timing_history.h b/cc/scheduler/compositor_timing_history.h
new file mode 100644
index 0000000000000000000000000000000000000000..7ff32fa73ae08eae4b14b5317211621d49313094
--- /dev/null
+++ b/cc/scheduler/compositor_timing_history.h
@@ -0,0 +1,61 @@
+// 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 "cc/base/rolling_time_delta_history.h"
+
+namespace cc {
+
+class RenderingStatsInstrumentation;
+
+class CompositorTimingHistory {
+ public:
+  explicit CompositorTimingHistory(
+      RenderingStatsInstrumentation* rendering_stats_instrumentation);
+  ~CompositorTimingHistory();
+
+  base::TimeDelta BeginMainFrameToCommitDurationEstimate() const;
+  base::TimeDelta PrepareTilesDurationEstimate() const;
+  base::TimeDelta PrepareTilesToReadyToActivateDurationEstimate() const;
+  base::TimeDelta ActivateDurationEstimate() const;
+  base::TimeDelta DrawDurationEstimate() const;
+
+  void PipelineReset();
+
+  void WillBeginMainFrame();
+  void BeginMainFrameAborted();
+  void DidCommit();
+  void WillPrepareTiles();
+  void DidPrepareTiles();
+  void ReadyToActivate();
+  void WillActivate();
+  void DidActivate();
+  void WillDraw();
+  void DidDraw();
+
+ protected:
+  void DidCommitInternal(base::TimeTicks commit_complete_time);
+
+  void AddDrawDurationUMA(base::TimeDelta draw_duration,
+                          base::TimeDelta draw_duration_estimate);
+
+  RollingTimeDeltaHistory begin_main_frame_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_;
+
+  base::TimeTicks begin_main_frame_sent_time_;
+  base::TimeTicks start_prepare_tiles_time_;
+  base::TimeTicks start_activate_time_;
+  base::TimeTicks start_draw_time_;
+
+  RenderingStatsInstrumentation* rendering_stats_instrumentation_;
+};
+
+}  // namespace cc
+
+#endif  // CC_SCHEDULER_COMPOSITOR_TIMING_HISTORY_H_