Remove #pragma once from media

media/video/capture/win/filter_base_win.h

 // Copyright (c) 2011 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.
 
 // Implement a simple base class for DirectShow filters. It may only be used in
 // a single threaded apartment.
 
 #ifndef MEDIA_VIDEO_CAPTURE_WIN_FILTER_BASE_WIN_H_
 #define MEDIA_VIDEO_CAPTURE_WIN_FILTER_BASE_WIN_H_
-#pragma once
 
 // Avoid including strsafe.h via dshow as it will cause build warnings.
 #define NO_DSHOW_STRSAFE
 #include <dshow.h>
 
 #include "base/memory/ref_counted.h"
 #include "base/win/scoped_comptr.h"
 
 namespace media {
 
@@ skipping 44 matching lines @@
  private:
   FILTER_STATE state_;
   base::win::ScopedComPtr<IFilterGraph> owning_graph_;
 
   DISALLOW_COPY_AND_ASSIGN(FilterBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_WIN_FILTER_BASE_WIN_H_