Make DefaultDeleter for Video{De|En}codeAccelerator

content/common/gpu/media/video_decode_accelerator_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_COMMON_GPU_MEDIA_VIDEO_DECODE_ACCELERATOR_IMPL_H_
 #define CONTENT_COMMON_GPU_MEDIA_VIDEO_DECODE_ACCELERATOR_IMPL_H_
 
 #include "content/common/content_export.h"
 #include "media/video/video_decode_accelerator.h"
 
 namespace content {
 
 class CONTENT_EXPORT VideoDecodeAcceleratorImpl
     : public media::VideoDecodeAccelerator {
  public:
   VideoDecodeAcceleratorImpl();
-  virtual ~VideoDecodeAcceleratorImpl();
 
   // Returns true if VDA::Decode and VDA::Client callbacks can run on the IO
   // thread. Otherwise they will run on the GPU child thread. The purpose of
   // running Decode on the IO thread is to reduce decode latency. Note Decode
   // should return as soon as possible and not block on the IO thread. Also,
   // PictureReady should be run on the child thread if a picture is delivered
   // the first time so it can be cleared.
   virtual bool CanDecodeOnIOThread();
+
+ protected:
+  virtual ~VideoDecodeAcceleratorImpl();
 };
 
 }  // namespace content
 
+namespace base {
+
+template <class T>
+struct DefaultDeleter;
+
+// Specialize DefaultDeleter so that scoped_ptr<VideoDecodeAcceleratorImpl>
+// always uses "Destroy()" instead of trying to use the destructor.
+template <>
+struct DefaultDeleter<content::VideoDecodeAcceleratorImpl> {
+ public:
+  inline void operator()(void* video_decode_accelerator) const {
+    static_cast<content::VideoDecodeAcceleratorImpl*>(video_decode_accelerator)
+        ->Destroy();
+  }
+};
+
+}  // namespace base
+
 #endif  // CONTENT_COMMON_GPU_MEDIA_VIDEO_DECODE_ACCELERATOR_IMPL_H_