Add codec name to CodecSpecificInfo and get the codec name stats from there instead.

webrtc/modules/video_coding/codecs/vp9/vp9_impl.cc

 /*
  *  Copyright (c) 2014 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 542 matching lines @@
   timestamp_ += duration;
 
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 void VP9EncoderImpl::PopulateCodecSpecific(CodecSpecificInfo* codec_specific,
                                            const vpx_codec_cx_pkt& pkt,
                                            uint32_t timestamp) {
   assert(codec_specific != NULL);
   codec_specific->codecType = kVideoCodecVP9;
+  codec_specific->codec_name = ImplementationName();
   CodecSpecificInfoVP9* vp9_info = &(codec_specific->codecSpecific.VP9);
   // TODO(asapersson): Set correct value.
   vp9_info->inter_pic_predicted =
       (pkt.data.frame.flags & VPX_FRAME_IS_KEY) ? false : true;
   vp9_info->flexible_mode = codec_.codecSpecific.VP9.flexibleMode;
   vp9_info->ss_data_available = ((pkt.data.frame.flags & VPX_FRAME_IS_KEY) &&
                                  !codec_.codecSpecific.VP9.flexibleMode)
                                     ? true
                                     : false;
 
@@ skipping 419 matching lines @@
   frame_buffer_pool_.ClearPool();
   inited_ = false;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 const char* VP9DecoderImpl::ImplementationName() const {
   return "libvpx";
 }
 
 }  // namespace webrtc