Fix stats for encoder target bitrate when target rate is zero.

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 40 matching lines @@
   int64_t _periodMs;
   int64_t _latestMs;
 };
 
 class VideoSender : public Module {
  public:
   typedef VideoCodingModule::SenderNackMode SenderNackMode;
 
   VideoSender(Clock* clock,
               EncodedImageCallback* post_encode_callback,
-              VideoEncoderRateObserver* encoder_rate_observer,
               VCMSendStatisticsCallback* send_stats_callback);
 
   ~VideoSender();
 
   // Register the send codec to be used.
   // This method must be called on the construction thread.
   int32_t RegisterSendCodec(const VideoCodec* sendCodec,
                             uint32_t numberOfCores,
                             uint32_t maxPayloadSize);
 
@@ skipping 132 matching lines @@
   VCMProcessTimer _receiveStatsTimer;
   VCMProcessTimer _retransmissionTimer;
   VCMProcessTimer _keyRequestTimer;
   QpParser qp_parser_;
   ThreadUnsafeOneTimeEvent first_frame_received_;
 };
 
 }  // namespace vcm
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_VIDEO_CODING_VIDEO_CODING_IMPL_H_