Refactoring the order of the weak_ptr_factory in chrome/renderer folder

chrome/renderer/media/cast_rtp_stream.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_
 #define CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 141 matching lines @@
   // track is a video track.
   bool IsAudio() const;
 
   void DidEncounterError(const std::string& message);
 
   blink::WebMediaStreamTrack track_;
   const scoped_refptr<CastSession> cast_session_;
   scoped_ptr<CastAudioSink> audio_sink_;
   scoped_ptr<CastVideoSink> video_sink_;
   CastRtpParams params_;
-  base::WeakPtrFactory<CastRtpStream> weak_factory_;
   base::Closure stop_callback_;
   ErrorCallback error_callback_;
 
+  base::WeakPtrFactory<CastRtpStream> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(CastRtpStream);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_