WeakPtr destruction order cleanup: media edition.

media/cast/audio_sender/audio_sender.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 MEDIA_CAST_AUDIO_SENDER_H_
 #define MEDIA_CAST_AUDIO_SENDER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 58 matching lines @@
       const MissingFramesAndPacketsMap& missing_frames_and_packets);
 
   void ResendPacketsOnTransportThread(
       const transport::MissingFramesAndPacketsMap& missing_packets);
 
   void ScheduleNextRtcpReport();
   void SendRtcpReport();
 
   void InitializeTimers();
 
-  base::WeakPtrFactory<AudioSender> weak_factory_;
-
   scoped_refptr<CastEnvironment> cast_environment_;
   transport::CastTransportSender* const transport_sender_;
   scoped_refptr<AudioEncoder> audio_encoder_;
   scoped_ptr<LocalRtpSenderStatistics> rtp_audio_sender_statistics_;
   scoped_ptr<LocalRtcpAudioSenderFeedback> rtcp_feedback_;
   Rtcp rtcp_;
   bool timers_initialized_;
   CastInitializationStatus cast_initialization_cb_;
 
+  // NOTE: This must always be last so it's invalidated before other member
+  // variables might be accessed.
+  base::WeakPtrFactory<AudioSender> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioSender);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_AUDIO_SENDER_H_