Renamed WebRTCStats.h to WebRTCLegacyStats.h and cleaned it up

third_party/WebKit/Source/modules/peerconnection/RTCStatsResponse.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 namespace blink {
 
 class RTCStatsResponse final : public RTCStatsResponseBase, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static RTCStatsResponse* create();
 
     const HeapVector<Member<RTCLegacyStatsReport>>& result() const { return m_result; }
     RTCLegacyStatsReport* namedItem(const AtomicString& name);
 
-    void addStats(const WebRTCStats&) override;
+    void addStats(const WebRTCLegacyStats&) override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     RTCStatsResponse();
 
     HeapVector<Member<RTCLegacyStatsReport>> m_result;
     HashMap<String, int> m_idmap;
 };
 
 } // namespace blink
 
 #endif // RTCStatsResponse_h