Clean up media header include guards

media/gpu/vt_video_decode_accelerator_mac.h

 // Copyright 2014 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_VT_VIDEO_DECODE_ACCELERATOR_H_
-#define CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_
+#ifndef MEDIA_GPU_VT_VIDEO_DECODE_ACCELERATOR_MAC_H_
+#define MEDIA_GPU_VT_VIDEO_DECODE_ACCELERATOR_MAC_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <queue>
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 251 matching lines @@
 
   // Declared last to ensure that all weak pointers are invalidated before
   // other destructors run.
   base::WeakPtrFactory<VTVideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VTVideoDecodeAccelerator);
 };
 
 }  // namespace media
 
-#endif  // CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_
+#endif  // MEDIA_GPU_VT_VIDEO_DECODE_ACCELERATOR_MAC_H_