Expose codec implementation names in stats.

talk/app/webrtc/statstypes.cc

Index: talk/app/webrtc/statstypes.cc
diff --git a/talk/app/webrtc/statstypes.cc b/talk/app/webrtc/statstypes.cc
index e45833c668a7c04aa375033e1573b1f683ec1fa6..19cb1f5d785c72b920e8c18b88da1afc9610e9dc 100644
--- a/talk/app/webrtc/statstypes.cc
+++ b/talk/app/webrtc/statstypes.cc
@@ -408,6 +408,8 @@ const char* StatsReport::Value::display_name() const {
       return "state";
     case kStatsValueNameDataChannelId:
       return "datachannelid";
+    case kStatsValueNameCodecImplementationName:
+      return "codecImplementationName";
 
     // 'goog' prefixed constants.
     case kStatsValueNameAccelerateRate:
@@ -592,9 +594,6 @@ const char* StatsReport::Value::display_name() const {
       return "googViewLimitedResolution";
     case kStatsValueNameWritable:
       return "googWritable";
-    default:
-      RTC_DCHECK(false);
-      break;
   }
 
   return nullptr;