Add QP stats for sent video streams to StatsReport.

talk/media/webrtc/webrtcvideoengine2.cc

 /*
  * libjingle
  * Copyright 2014 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 2231 matching lines @@
   for (std::map<uint32_t, webrtc::VideoSendStream::StreamStats>::iterator it =
            stats.substreams.begin();
        it != stats.substreams.end(); ++it) {
     // TODO(pbos): Wire up additional stats, such as padding bytes.
     webrtc::VideoSendStream::StreamStats stream_stats = it->second;
     info.bytes_sent += stream_stats.rtp_stats.transmitted.payload_bytes +
                        stream_stats.rtp_stats.transmitted.header_bytes +
                        stream_stats.rtp_stats.transmitted.padding_bytes;
     info.packets_sent += stream_stats.rtp_stats.transmitted.packets;
     info.packets_lost += stream_stats.rtcp_stats.cumulative_lost;
-    if (stream_stats.width > info.send_frame_width)
+    if (stream_stats.width > info.send_frame_width) {
       info.send_frame_width = stream_stats.width;
+      info.qp = stream_stats.qp;  // Report highest layer.
+    }
     if (stream_stats.height > info.send_frame_height)
       info.send_frame_height = stream_stats.height;
     info.firs_rcvd += stream_stats.rtcp_packet_type_counts.fir_packets;
     info.nacks_rcvd += stream_stats.rtcp_packet_type_counts.nack_packets;
     info.plis_rcvd += stream_stats.rtcp_packet_type_counts.pli_packets;
   }
 
   if (!stats.substreams.empty()) {
     // TODO(pbos): Report fraction lost per SSRC.
     webrtc::VideoSendStream::StreamStats first_stream_stats =
@@ skipping 485 matching lines @@
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VIDEO