Clean up media header include guards

media/cast/test/utility/input_builder.h

Index: media/cast/test/utility/input_builder.h
diff --git a/media/cast/test/utility/input_builder.h b/media/cast/test/utility/input_builder.h
index cb025b4e8fe5305a2fd9d67e47ffc1eab7293a52..a4840a4e77839771a72a669541e58bd4ac1aaa21 100644
--- a/media/cast/test/utility/input_builder.h
+++ b/media/cast/test/utility/input_builder.h
@@ -2,8 +2,8 @@
 // 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_INPUT_BUILDER_
-#define MEDIA_CAST_TEST_UTILITY_INPUT_BUILDER_
+#ifndef MEDIA_CAST_TEST_UTILITY_INPUT_BUILDER_H_
+#define MEDIA_CAST_TEST_UTILITY_INPUT_BUILDER_H_
 
 #include <limits.h>
 
@@ -48,4 +48,4 @@ class InputBuilder {
 }  // namespace cast
 }  // namespace media
 
-#endif  // MEDIA_CAST_TEST_UTILITY_INPUT_BUILDER_
+#endif  // MEDIA_CAST_TEST_UTILITY_INPUT_BUILDER_H_