WeakPtr destruction order cleanup: media edition.

media/filters/audio_renderer_impl.h

Index: media/filters/audio_renderer_impl.h
diff --git a/media/filters/audio_renderer_impl.h b/media/filters/audio_renderer_impl.h
index f035c37261e38e17c23d9fd4325b5421bcfc4099..8c0ce80c8823276b696a664b97112028ad247653 100644
--- a/media/filters/audio_renderer_impl.h
+++ b/media/filters/audio_renderer_impl.h
@@ -180,8 +180,6 @@ class MEDIA_EXPORT AudioRendererImpl
   void ResetDecoderDone();
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-  base::WeakPtrFactory<AudioRendererImpl> weak_factory_;
-  base::WeakPtr<AudioRendererImpl> weak_this_;
 
   scoped_ptr<AudioSplicer> splicer_;
 
@@ -264,6 +262,9 @@ class MEDIA_EXPORT AudioRendererImpl
 
   // End variables which must be accessed under |lock_|. ----------------------
 
+  // NOTE: Weak pointers must be invalidated before all other member variables.
+  base::WeakPtrFactory<AudioRendererImpl> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };