Fix WeakPtrFactory members in Android media classes

content/renderer/media/android/media_source_delegate.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 CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_SOURCE_DELEGATE_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_SOURCE_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 209 matching lines @@
   base::TimeDelta browser_seek_time_;
   bool expecting_regular_seek_;
 
   size_t access_unit_size_;
 
   // Task runner for main renderer and media threads.
   const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
   const scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
+  base::WeakPtr<MediaSourceDelegate> main_weak_this_;
   base::WeakPtrFactory<MediaSourceDelegate> main_weak_factory_;
   base::WeakPtrFactory<MediaSourceDelegate> media_weak_factory_;
-  base::WeakPtr<MediaSourceDelegate> main_weak_this_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSourceDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_SOURCE_DELEGATE_H_