WeakPtr destruction order cleanup: media edition.

content/renderer/media/android/webmediaplayer_android.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_WEBMEDIAPLAYER_ANDROID_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_
 
 #include <jni.h>
 #include <string>
 #include <vector>
@@ skipping 425 matching lines @@
 
   // Temporary for EME v0.1. In the future the init data type should be passed
   // through GenerateKeyRequest() directly from WebKit.
   std::string init_data_type_;
 
   media::DecryptorReadyCB decryptor_ready_cb_;
 
   // Manages decryption keys and decrypts encrypted frames.
   scoped_ptr<ProxyDecryptor> proxy_decryptor_;
 
+  // NOTE: This must always be last so it's invalidated before other member
+  // variables might be accessed.
   base::WeakPtrFactory<WebMediaPlayerAndroid> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_