Add QP stats for sent video streams to StatsReport.

talk/media/webrtc/webrtcvideoengine2.cc

Index: talk/media/webrtc/webrtcvideoengine2.cc
diff --git a/talk/media/webrtc/webrtcvideoengine2.cc b/talk/media/webrtc/webrtcvideoengine2.cc
index 2d648b73a3912bf26a0bcb67fc99dc07be5b808c..a41b9bd7e9261e000bc92ecc22418aba5b4b4731 100644
--- a/talk/media/webrtc/webrtcvideoengine2.cc
+++ b/talk/media/webrtc/webrtcvideoengine2.cc
@@ -2249,8 +2249,10 @@ WebRtcVideoChannel2::WebRtcVideoSendStream::GetVideoSenderInfo() {
                        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;