Expose codec implementation names in stats.

webrtc/video/receive_statistics_proxy.cc

Index: webrtc/video/receive_statistics_proxy.cc
diff --git a/webrtc/video/receive_statistics_proxy.cc b/webrtc/video/receive_statistics_proxy.cc
index 329905d0f85fe846ae08ba68f010b403ba3a6d33..c13c807fc415fcea2d73935988a4430425f9c3cf 100644
--- a/webrtc/video/receive_statistics_proxy.cc
+++ b/webrtc/video/receive_statistics_proxy.cc
@@ -80,6 +80,11 @@ void ReceiveStatisticsProxy::OnIncomingPayloadType(int payload_type) {
   stats_.current_payload_type = payload_type;
 }
 
+void ReceiveStatisticsProxy::OnDecoderImplementationName(
+    const char* implementation_name) {
+  rtc::CritScope lock(&crit_);
+  stats_.decoder_implementation_name = implementation_name;
+}
 void ReceiveStatisticsProxy::OnIncomingRate(unsigned int framerate,
                                             unsigned int bitrate_bps) {
   rtc::CritScope lock(&crit_);