Add a rate tracker that tracks rate over a given interval split up into buckets that accumulate uni…

webrtc/video/send_statistics_proxy.h

Index: webrtc/video/send_statistics_proxy.h
diff --git a/webrtc/video/send_statistics_proxy.h b/webrtc/video/send_statistics_proxy.h
index 60d962f93b3a1cdf541868fab929001fdce7d801..c127550f77c863784d9d3d67b088bd8d7b04724c 100644
--- a/webrtc/video/send_statistics_proxy.h
+++ b/webrtc/video/send_statistics_proxy.h
@@ -13,8 +13,8 @@
 
 #include <string>
 
+#include "webrtc/base/bucketratetracker.h"
 #include "webrtc/base/criticalsection.h"
-#include "webrtc/base/ratetracker.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/common_types.h"
@@ -38,6 +38,7 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
                             public SendSideDelayObserver {
  public:
   static const int kStatsTimeoutMs;
+  static const size_t kFrameRateTrackerInterval;
 
   SendStatisticsProxy(Clock* clock, const VideoSendStream::Config& config);
   virtual ~SendStatisticsProxy();
@@ -116,9 +117,9 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
   const VideoSendStream::Config config_;
   mutable rtc::CriticalSection crit_;
   VideoSendStream::Stats stats_ GUARDED_BY(crit_);
-  rtc::RateTracker input_frame_rate_tracker_ GUARDED_BY(crit_);
-  rtc::RateTracker input_frame_rate_tracker_total_ GUARDED_BY(crit_);
-  rtc::RateTracker sent_frame_rate_tracker_total_ GUARDED_BY(crit_);
+  rtc::IntervalRateTracker input_frame_rate_tracker_ GUARDED_BY(crit_);
+  rtc::IntervalRateTracker input_frame_rate_tracker_total_ GUARDED_BY(crit_);
+  rtc::IntervalRateTracker sent_frame_rate_tracker_total_ GUARDED_BY(crit_);
   uint32_t last_sent_frame_timestamp_ GUARDED_BY(crit_);
   std::map<uint32_t, StatsUpdateTimes> update_times_ GUARDED_BY(crit_);