RTCPeerConnection.getStats: Remove selector argument.

third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.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
@@ skipping 129 matching lines @@
   void addStream(ExecutionContext*,
                  MediaStream*,
                  const Dictionary& mediaConstraints,
                  ExceptionState&);
 
   void removeStream(MediaStream*, ExceptionState&);
 
   ScriptPromise getStats(ScriptState*,
                          RTCStatsCallback* successCallback,
                          MediaStreamTrack* selector = nullptr);
-  ScriptPromise getStats(ScriptState*, MediaStreamTrack* selector = nullptr);
+  ScriptPromise getStats(ScriptState*);
 
   RTCDataChannel* createDataChannel(ExecutionContext*,
                                     String label,
                                     const Dictionary& dataChannelDict,
                                     ExceptionState&);
 
   RTCDTMFSender* createDTMFSender(MediaStreamTrack*, ExceptionState&);
 
   void close(ExceptionState&);
 
@@ skipping 94 matching lines @@
 
   bool m_stopped;
   bool m_closed;
 
   bool m_hasDataChannels;  // For RAPPOR metrics
 };
 
 }  // namespace blink
 
 #endif  // RTCPeerConnection_h