Expose codec implementation names in stats.

talk/app/webrtc/statscollector.cc

Index: talk/app/webrtc/statscollector.cc
diff --git a/talk/app/webrtc/statscollector.cc b/talk/app/webrtc/statscollector.cc
index 893e5866b0312a8d064ca027541ae93228b8570c..b514b42feeaf4369e538167f4d466f6006a52d66 100644
--- a/talk/app/webrtc/statscollector.cc
+++ b/talk/app/webrtc/statscollector.cc
@@ -201,6 +201,8 @@ void ExtractStats(const cricket::VoiceSenderInfo& info, StatsReport* report) {
 
 void ExtractStats(const cricket::VideoReceiverInfo& info, StatsReport* report) {
   ExtractCommonReceiveProperties(info, report);
+  report->AddString(StatsReport::kStatsValueNameCodecImplementationName,
+                    info.decoder_implementation_name);
   report->AddInt64(StatsReport::kStatsValueNameBytesReceived,
                    info.bytes_rcvd);
   report->AddInt64(StatsReport::kStatsValueNameCaptureStartNtpTimeMs,
@@ -233,6 +235,8 @@ void ExtractStats(const cricket::VideoReceiverInfo& info, StatsReport* report) {
 void ExtractStats(const cricket::VideoSenderInfo& info, StatsReport* report) {
   ExtractCommonSendProperties(info, report);
 
+  report->AddString(StatsReport::kStatsValueNameCodecImplementationName,
+                    info.encoder_implementation_name);
   report->AddBoolean(StatsReport::kStatsValueNameBandwidthLimitedResolution,
                      (info.adapt_reason & 0x2) > 0);
   report->AddBoolean(StatsReport::kStatsValueNameCpuLimitedResolution,