Fix use-after-free of ChildSharedBitmapManager

content/child/child_shared_bitmap_manager.h

 // Copyright (c) 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_CHILD_CHILD_SHARED_BITMAP_MANAGER_H_
 #define CONTENT_CHILD_CHILD_SHARED_BITMAP_MANAGER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "cc/resources/shared_bitmap_manager.h"
 #include "content/child/thread_safe_sender.h"
 
 namespace content {
 
 class ChildSharedBitmapManager : public cc::SharedBitmapManager {
  public:
   ChildSharedBitmapManager(scoped_refptr<ThreadSafeSender> sender);
   virtual ~ChildSharedBitmapManager();
 
   virtual scoped_ptr<cc::SharedBitmap> AllocateSharedBitmap(
       const gfx::Size& size) OVERRIDE;
   virtual scoped_ptr<cc::SharedBitmap> GetSharedBitmapFromId(
       const gfx::Size&,
       const cc::SharedBitmapId&) OVERRIDE;
   virtual scoped_ptr<cc::SharedBitmap> GetBitmapForSharedMemory(
       base::SharedMemory* mem) OVERRIDE;
 
  private:
-  void FreeSharedMemory(cc::SharedBitmap* bitmap);
-  void ReleaseSharedBitmap(cc::SharedBitmap*);
-
   scoped_refptr<ThreadSafeSender> sender_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildSharedBitmapManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_CHILD_SHARED_BITMAP_MANAGER_H_