Expose codec implementation names in stats.

webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.cc

Index: webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.cc
diff --git a/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.cc b/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.cc
index 61ef80bbf138deaaf42d61b78992c315393a1a12..8626aea8909a61e20ccf940ebb4e010ee5b48348 100644
--- a/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.cc
+++ b/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.cc
@@ -266,6 +266,10 @@ void H264VideoToolboxDecoder::SetVideoFormat(
   }
 }
 
+const char* H264VideoToolboxDecoder::ImplementationName() const {
+  return "VideoToolbox";

[stefan-webrtc, 2015/10/27 08:31:53]

Maybe it should at least be named H264VideoToolbox? If they end up supporting
other codecs?

[pbos-webrtc, 2015/10/27 12:16:59]

Covered by codec name, we call both VP8 and VP9 "libvpx".

+}
+
 }  // namespace webrtc
 
 #endif  // defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)