Added log messages for important call setup events: first packet sent/received

webrtc/modules/video_coding/video_coding_impl.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 198 matching lines @@
   bool drop_frames_until_keyframe_ GUARDED_BY(process_crit_sect_);
   size_t max_nack_list_size_ GUARDED_BY(process_crit_sect_);
 
   VCMCodecDataBase _codecDataBase GUARDED_BY(_receiveCritSect);
   EncodedImageCallback* pre_decode_image_callback_ GUARDED_BY(_receiveCritSect);
 
   VCMProcessTimer _receiveStatsTimer;
   VCMProcessTimer _retransmissionTimer;
   VCMProcessTimer _keyRequestTimer;
   QpParser qp_parser_;
+  bool received_first_frame_;
 };
 
 }  // namespace vcm
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_VIDEO_CODING_VIDEO_CODING_IMPL_H_