cc: Improve frame/commit accounting

cc/CCFrameRateCounter.h

Index: cc/CCFrameRateCounter.h
diff --git a/cc/CCFrameRateCounter.h b/cc/CCFrameRateCounter.h
index 76b42242565b74db6467aff88fc71c62796561e4..0b9256bb66ab5009fbc50103bb2b24712df02bc4 100644
--- a/cc/CCFrameRateCounter.h
+++ b/cc/CCFrameRateCounter.h
@@ -23,7 +23,7 @@ public:
 
     void markBeginningOfFrame(double timestamp);
     void markEndOfFrame();
-    int currentFrameNumber() const { return m_currentFrameNumber; }
+    uint64_t currentFrameNumber() const { return m_currentFrameNumber; }
     void getAverageFPSAndStandardDeviation(double& averageFPS, double& standardDeviation) const;
     int timeStampHistorySize() const { return kTimeStampHistorySize; }
 
@@ -35,8 +35,6 @@ public:
     // true if the given frame interval is too fast or too slow, based on constant thresholds.
     bool isBadFrameInterval(double intervalBetweenConsecutiveFrames) const;
 
-    int droppedFrameCount() const { return m_droppedFrameCount; }
-
 private:
     CCFrameRateCounter();
 
@@ -57,11 +55,9 @@ private:
 
     static const int kTimeStampHistorySize = 120;
 
-    int m_currentFrameNumber;
+    uint64_t m_currentFrameNumber;
     double m_timeStampHistory[kTimeStampHistorySize];
 
-    int m_droppedFrameCount;
-
     DISALLOW_COPY_AND_ASSIGN(CCFrameRateCounter);
 };