Add delay metric (includes network delay (rtt/2) + jitter delay + decode time +

webrtc/video_engine/vie_channel.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 425 matching lines @@
   rtc::scoped_ptr<ThreadWrapper> decode_thread_;
 
   int nack_history_size_sender_;
   int max_nack_reordering_threshold_;
   I420FrameCallback* pre_render_callback_ GUARDED_BY(crit_);
 
   const rtc::scoped_ptr<ReportBlockStats> report_block_stats_sender_;
 
   int64_t time_of_first_rtt_ms_ GUARDED_BY(crit_);
   int64_t rtt_sum_ms_ GUARDED_BY(crit_);
+  int64_t last_rtt_ms_ GUARDED_BY(crit_);
   size_t num_rtts_ GUARDED_BY(crit_);
 
   // RtpRtcp modules, declared last as they use other members on construction.
   const std::vector<RtpRtcp*> rtp_rtcp_modules_;
   size_t num_active_rtp_rtcp_modules_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_ENGINE_VIE_CHANNEL_H_