Add UMA stats to bad call detection.

webrtc/video/receive_statistics_proxy.h

Index: webrtc/video/receive_statistics_proxy.h
diff --git a/webrtc/video/receive_statistics_proxy.h b/webrtc/video/receive_statistics_proxy.h
index 33b13f7126e1fa994c82772624cd0c567e106a7d..8ee605f0657d7ece13558ab60b0f8eb3ba5de3e8 100644
--- a/webrtc/video/receive_statistics_proxy.h
+++ b/webrtc/video/receive_statistics_proxy.h
@@ -117,6 +117,8 @@ class ReceiveStatisticsProxy : public VCMReceiveStatisticsCallback,
   QualityThreshold qp_threshold_ GUARDED_BY(crit_);
   QualityThreshold variance_threshold_ GUARDED_BY(crit_);
   SampleCounter qp_sample_ GUARDED_BY(crit_);
+  int num_bad_states_ GUARDED_BY(crit_);
+  int num_certain_states_ GUARDED_BY(crit_);
   VideoReceiveStream::Stats stats_ GUARDED_BY(crit_);
   RateStatistics decode_fps_estimator_ GUARDED_BY(crit_);
   RateStatistics renders_fps_estimator_ GUARDED_BY(crit_);