Fix Windows component builds: Use component type in gyp build for media_gpu

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_
 
 #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"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
 #include "media/filters/h264_parser.h"
 #include "media/gpu/gpu_video_decode_accelerator_helpers.h"
+#include "media/gpu/media_gpu_export.h"
 #include "media/gpu/vt_mac.h"
 #include "media/video/h264_poc.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_context_cgl.h"
 #include "ui/gl/gl_image_io_surface.h"
 
 namespace media {
 
 // Preload VideoToolbox libraries, needed for sandbox warmup.
-bool InitializeVideoToolbox();
+MEDIA_GPU_EXPORT bool 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(
       const MakeGLContextCurrentCallback& make_context_current_cb,
       const BindGLImageCallback& bind_image_cb);
 
   ~VTVideoDecodeAccelerator() override;
@@ skipping 224 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_