Make header include guards great again

runtime/bin/loader.h

Index: runtime/bin/loader.h
diff --git a/runtime/bin/loader.h b/runtime/bin/loader.h
index 4fe6ac09a309d5c3f1c38b3d892fa187cc191a0d..6ddf49f566de1b56b2b77542e4772b355574ff5f 100644
--- a/runtime/bin/loader.h
+++ b/runtime/bin/loader.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 BIN_LOADER_H_
-#define BIN_LOADER_H_
+#ifndef RUNTIME_BIN_LOADER_H_
+#define RUNTIME_BIN_LOADER_H_
 
 #include "bin/isolate_data.h"
 #include "include/dart_api.h"
@@ -146,4 +146,4 @@ class Loader {
 }  // namespace bin
 }  // namespace dart
 
-#endif  // BIN_LOADER_H_
+#endif  // RUNTIME_BIN_LOADER_H_