Make header include guards great again

runtime/vm/random.h

Index: runtime/vm/random.h
diff --git a/runtime/vm/random.h b/runtime/vm/random.h
index f5614dedbfce29854178f3c1665f379a088d5da3..311760f807c87a635e5cf92da02d9fbc35390136 100644
--- a/runtime/vm/random.h
+++ b/runtime/vm/random.h
@@ -2,8 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#ifndef VM_RANDOM_H_
-#define VM_RANDOM_H_
+#ifndef RUNTIME_VM_RANDOM_H_
+#define RUNTIME_VM_RANDOM_H_
 
 #include "vm/globals.h"
 #include "vm/allocation.h"
@@ -34,4 +34,4 @@ class Random {
 
 }  // namespace dart
 
-#endif  // VM_RANDOM_H_
+#endif  // RUNTIME_VM_RANDOM_H_