Implement qpSum stat for video send ssrc stats.

webrtc/api/statstypes.cc

 /*
  *  Copyright 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 383 matching lines @@
     case kStatsValueNameDataChannelId:
       return "datachannelid";
     case kStatsValueNameFramesDecoded:
       return "framesDecoded";
     case kStatsValueNameFramesEncoded:
       return "framesEncoded";
     case kStatsValueNameCodecImplementationName:
       return "codecImplementationName";
     case kStatsValueNameMediaType:
       return "mediaType";
+    case kStatsValueNameQpSum:
+      return "qpSum";
     // 'goog' prefixed constants.
     case kStatsValueNameAccelerateRate:
       return "googAccelerateRate";
     case kStatsValueNameActiveConnection:
       return "googActiveConnection";
     case kStatsValueNameActualEncBitrate:
       return "googActualEncBitrate";
     case kStatsValueNameAvailableReceiveBandwidth:
       return "googAvailableReceiveBandwidth";
     case kStatsValueNameAvailableSendBandwidth:
@@ skipping 362 matching lines @@
 // Looks for a report with the given |id|.  If one is not found, NULL
 // will be returned.
 StatsReport* StatsCollection::Find(const StatsReport::Id& id) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   Container::iterator it = std::find_if(list_.begin(), list_.end(),
       [&id](const StatsReport* r)->bool { return r->id()->Equals(id); });
   return it == list_.end() ? nullptr : *it;
 }
 
 }  // namespace webrtc