Clean up media header include guards

media/cast/test/utility/video_utility.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 MEDIA_CAST_TEST_UTILITY_VIDEO_UTILITY_H_
+#define MEDIA_CAST_TEST_UTILITY_VIDEO_UTILITY_H_
+
 // Utility functions for video testing.
 
 #include "media/base/video_frame.h"
 
 namespace media {
 namespace cast {
 
 // Compute and return PSNR between two frames.
 double I420PSNR(const scoped_refptr<media::VideoFrame>& frame1,
                 const scoped_refptr<media::VideoFrame>& frame2);
@@ skipping 10 matching lines @@
 
 // Populate a video frame with noise.
 void PopulateVideoFrameWithNoise(VideoFrame* frame);
 
 // Populate a video frame from a file.
 // Returns true if frame was populated, false if not (EOF).
 bool PopulateVideoFrameFromFile(VideoFrame* frame, FILE* video_file);
 
 }  // namespace cast
 }  // namespace media
+
+#endif  // MEDIA_CAST_TEST_UTILITY_VIDEO_UTILITY_H_