cc: Improve frame/commit accounting

cc/CCDelayBasedTimeSource.cpp

 // 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 "config.h"
 
 #include "CCDelayBasedTimeSource.h"
 
 #include "TraceEvent.h"
 #include <algorithm>
@@ skipping 72 matching lines @@
 base::TimeTicks CCDelayBasedTimeSource::lastTickTime()
 {
     return m_lastTickTime;
 }
 
 base::TimeTicks CCDelayBasedTimeSource::nextTickTime()
 {
     return active() ? m_currentParameters.tickTarget : base::TimeTicks();
 }
 
+base::TimeDelta CCDelayBasedTimeSource::interval()
+{
+    return m_currentParameters.interval;
+}
+
 void CCDelayBasedTimeSource::onTimerFired()
 {
     ASSERT(m_state != STATE_INACTIVE);
 
     base::TimeTicks now = this->now();
     m_lastTickTime = now;
 
     if (m_state == STATE_STARTING) {
         setTimebaseAndInterval(now, m_currentParameters.interval);
         m_state = STATE_ACTIVE;
@@ skipping 120 matching lines @@
     base::TimeDelta delay = newTickTarget - now;
     ASSERT(delay.InMillisecondsF() <=
            m_nextParameters.interval.InMillisecondsF() * (1.0 + doubleTickThreshold));
     m_timer.startOneShot(delay.InSecondsF());
 
     m_nextParameters.tickTarget = newTickTarget;
     m_currentParameters = m_nextParameters;
 }
 
 }