Make header include guards great again

runtime/bin/lockers.h

Index: runtime/bin/lockers.h
diff --git a/runtime/bin/lockers.h b/runtime/bin/lockers.h
index 0aefd9920a655a8e6bb5979cd296b423a10a44c1..836eedaa9ec130502894ae53b50107c63f14dcbf 100644
--- a/runtime/bin/lockers.h
+++ b/runtime/bin/lockers.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_LOCKERS_H_
-#define BIN_LOCKERS_H_
+#ifndef RUNTIME_BIN_LOCKERS_H_
+#define RUNTIME_BIN_LOCKERS_H_
 
 #include "bin/thread.h"
 #include "platform/assert.h"
@@ -61,4 +61,4 @@ class MonitorLocker {
 }  // namespace bin
 }  // namespace dart
 
-#endif  // BIN_LOCKERS_H_
+#endif  // RUNTIME_BIN_LOCKERS_H_