Clean up media header include guards

media/base/test_random.h

 // Copyright 2015 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_BLINK_TEST_RANDOM_H_
-#define MEDIA_BLINK_TEST_RANDOM_H_
+#ifndef MEDIA_BASE_TEST_RANDOM_H_
+#define MEDIA_BASE_TEST_RANDOM_H_
 
 #include <stdint.h>
 
 #include "base/logging.h"
 
 // Vastly simplified ACM random class meant to only be used for testing.
 // This class is meant to generate predictable sequences of pseudorandom
 // numbers, unlike the classes in base/rand_util.h which are meant to generate
 // unpredictable sequences.
 // See
@@ skipping 18 matching lines @@
     return seed_;
   }
 
  private:
   static const uint64_t M = 2147483647L;  // 2^32-1
   int32_t seed_;
 };
 
 }  // namespace media
 
-#endif  // MEDIA_BLINK_TEST_RANDOM_H_
+#endif  // MEDIA_BASE_TEST_RANDOM_H_