cc: Save correct frame begin time to FrameRateCounter

cc/scheduler.cc

 // 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.
 
 #include "cc/scheduler.h"
 
 #include "base/auto_reset.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 
@@ skipping 132 matching lines @@
 void Scheduler::setTimebaseAndInterval(base::TimeTicks timebase, base::TimeDelta interval)
 {
     m_frameRateController->setTimebaseAndInterval(timebase, interval);
 }
 
 base::TimeTicks Scheduler::anticipatedDrawTime()
 {
     return m_frameRateController->nextTickTime();
 }
 
+base::TimeTicks Scheduler::lastVSyncTime()
+{
+    return m_frameRateController->lastTickTime();
+}
+
 void Scheduler::vsyncTick(bool throttled)
 {
     TRACE_EVENT1("cc", "Scheduler::vsyncTick", "throttled", throttled);
     if (!throttled)
         m_stateMachine.DidEnterVSync();
     processScheduledActions();
     if (!throttled)
         m_stateMachine.DidLeaveVSync();
 }
 
@@ skipping 47 matching lines @@
         }
         action = m_stateMachine.NextAction();
     }
 
     // Activate or deactivate the frame rate controller.
     m_frameRateController->setActive(m_stateMachine.VSyncCallbackNeeded());
     m_client->didAnticipatedDrawTimeChange(m_frameRateController->nextTickTime());
 }
 
 }  // namespace cc