Chromoting to report roundtrip latency

remoting/client/chromoting_stats.h

Index: remoting/client/chromoting_stats.h
diff --git a/remoting/client/chromoting_stats.h b/remoting/client/chromoting_stats.h
index e9f89ff68f1bdeb0b30e9040cfb1c736787ffb08..4fd9aea5026cb00bb55ffa96111fc4225306bcfa 100644
--- a/remoting/client/chromoting_stats.h
+++ b/remoting/client/chromoting_stats.h
@@ -22,6 +22,7 @@ class ChromotingStats {
   RunningAverage* video_encode_ms() { return &video_encode_ms_; }
   RunningAverage* video_decode_ms() { return &video_decode_ms_; }
   RunningAverage* video_paint_ms() { return &video_paint_ms_; }
+  RunningAverage* round_trip_ms() { return &round_trip_ms_; }
 
  private:
   RateCounter video_bandwidth_;
@@ -29,6 +30,7 @@ class ChromotingStats {
   RunningAverage video_encode_ms_;
   RunningAverage video_decode_ms_;
   RunningAverage video_paint_ms_;
+  RunningAverage round_trip_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingStats);
 };