Make header include guards great again

runtime/bin/io_natives.h

Index: runtime/bin/io_natives.h
diff --git a/runtime/bin/io_natives.h b/runtime/bin/io_natives.h
index c17dce5a1b3cd555175974d592f89254423bcba2..0c64e592eaf593629dfba83846b4a9870a6cab3a 100644
--- a/runtime/bin/io_natives.h
+++ b/runtime/bin/io_natives.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_IO_NATIVES_H_
-#define BIN_IO_NATIVES_H_
+#ifndef RUNTIME_BIN_IO_NATIVES_H_
+#define RUNTIME_BIN_IO_NATIVES_H_
 
 #include "include/dart_api.h"
 
@@ -19,4 +19,4 @@ const uint8_t* IONativeSymbol(Dart_NativeFunction nf);
 }  // namespace bin
 }  // namespace dart
 
-#endif  // BIN_IO_NATIVES_H_
+#endif  // RUNTIME_BIN_IO_NATIVES_H_