WeakPtr destruction order cleanup: media edition.

content/browser/media/android/media_resource_getter_impl.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_BROWSER_MEDIA_ANDROID_MEDIA_RESOURCE_GETTER_IMPL_H_
 #define CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_RESOURCE_GETTER_IMPL_H_
 
 #include <jni.h>
 #include <string>
 
@@ skipping 51 matching lines @@
   // Called when GetPlatformPathFromFileSystemURL() finishes.
   void GetPlatformPathCallback(
       const GetPlatformPathCB& callback, const std::string& platform_path);
 
   // BrowserContext to retrieve URLRequestContext and ResourceContext.
   BrowserContext* browser_context_;
 
   // FileSystemContext to be used on FILE thread.
   fileapi::FileSystemContext* file_system_context_;
 
-  // Used to post tasks.
-  base::WeakPtrFactory<MediaResourceGetterImpl> weak_this_;
-
   // Render process id, used to check whether the process can access cookies.
   int renderer_id_;
 
   // Routing id for the render view, used to check tab specific cookie policy.
   int routing_id_;
 
+  // Used to post tasks.  NOTE: This must always be last so it's invalidated
+  // before other member variables might be accessed.
+  base::WeakPtrFactory<MediaResourceGetterImpl> weak_this_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaResourceGetterImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_RESOURCE_GETTER_IMPL_H_