cc: Save correct frame begin time to FrameRateCounter

cc/scheduler.h

 // Copyright 2011 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_H_
 #define CC_SCHEDULER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
@@ skipping 80 matching lines @@
 
     void didLoseOutputSurface();
     void didRecreateOutputSurface();
 
     bool commitPending() const { return m_stateMachine.commitPending(); }
     bool redrawPending() const { return m_stateMachine.redrawPending(); }
 
     void setTimebaseAndInterval(base::TimeTicks timebase, base::TimeDelta interval);
 
     base::TimeTicks anticipatedDrawTime();
+    base::TimeTicks lastDrawTime();
 
     // FrameRateControllerClient implementation
     virtual void vsyncTick(bool throttled) OVERRIDE;
 
 private:
     Scheduler(SchedulerClient*, scoped_ptr<FrameRateController>,
               const SchedulerSettings& schedulerSettings);
 
     void processScheduledActions();
 
     const SchedulerSettings m_settings;
     SchedulerClient* m_client;
     scoped_ptr<FrameRateController> m_frameRateController;
     SchedulerStateMachine m_stateMachine;
     bool m_insideProcessScheduledActions;
 
     DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_H_