Make RTCStatsReport::ToString() return JSON-parseable string.

webrtc/api/stats/rtcstats.h

Index: webrtc/api/stats/rtcstats.h
diff --git a/webrtc/api/stats/rtcstats.h b/webrtc/api/stats/rtcstats.h
index 6730672012abd919b088d0a7bbf6341d4c50796c..c12ca916bbcc10247f1fc75c86b7831b6575997f 100644
--- a/webrtc/api/stats/rtcstats.h
+++ b/webrtc/api/stats/rtcstats.h
@@ -72,8 +72,8 @@ class RTCStats {
   bool operator==(const RTCStats& other) const;
   bool operator!=(const RTCStats& other) const;
 
-  // Creates a human readable string representation of the stats object, listing
-  // all of its members (names and values).
+  // Creates a human (and JSON) readable string representation of the stats
+  // object, listing all of its members (names and values).
   std::string ToString() const;

[hbos, 2017/07/25 12:29:21]

Let's rename it ToJson().

 
   // Downcasts the stats object to an |RTCStats| subclass |T|. DCHECKs that the