Sandbox initialization for VideoToolbox.

content/common/gpu/media/vt_video_decode_accelerator.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_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 10 matching lines @@
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_context_cgl.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace content {
 
+// Preload VideoToolbox libraries.
+void InitializeVideoToolbox();
+
 // VideoToolbox.framework implementation of the VideoDecodeAccelerator
 // interface for Mac OS X (currently limited to 10.9+).
 class VTVideoDecodeAccelerator : public media::VideoDecodeAccelerator {
  public:
   explicit VTVideoDecodeAccelerator(
       CGLContextObj cgl_context,
       const base::Callback<bool(void)>& make_context_current);
   ~VTVideoDecodeAccelerator() override;
 
   // VideoDecodeAccelerator implementation.
@@ skipping 143 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 content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_