cc: Improve frame/commit accounting

cc/CCTimeSource.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 CCTimeSource_h
 #define CCTimeSource_h
 
 #include "base/time.h"
 #include <wtf/RefCounted.h>
 
@@ skipping 16 matching lines @@
 // timer, or it will keep on ticking!
 class CCTimeSource : public RefCounted<CCTimeSource> {
 public:
     virtual ~CCTimeSource() { }
     virtual void setClient(CCTimeSourceClient*) = 0;
     virtual void setActive(bool) = 0;
     virtual bool active() const = 0;
     virtual void setTimebaseAndInterval(base::TimeTicks timebase, base::TimeDelta interval) = 0;
     virtual base::TimeTicks lastTickTime() = 0;
     virtual base::TimeTicks nextTickTime() = 0;
+    virtual base::TimeDelta interval() = 0;
 };
 
 }
 #endif // CCSmoothedTimer_h