Make header include guards great again

runtime/bin/embedded_dart_io.h

Index: runtime/bin/embedded_dart_io.h
diff --git a/runtime/bin/embedded_dart_io.h b/runtime/bin/embedded_dart_io.h
index 56dbba8a083f04be4ee434c4680722ba091068c9..84f5aa4af3ee22c395ad6185c44b8af38546ac3e 100644
--- a/runtime/bin/embedded_dart_io.h
+++ b/runtime/bin/embedded_dart_io.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_EMBEDDED_DART_IO_H_
-#define BIN_EMBEDDED_DART_IO_H_
+#ifndef RUNTIME_BIN_EMBEDDED_DART_IO_H_
+#define RUNTIME_BIN_EMBEDDED_DART_IO_H_
 
 namespace dart {
 namespace bin {
@@ -30,4 +30,4 @@ bool ShouldCaptureStderr();
 }  // namespace bin
 }  // namespace dart
 
-#endif  // BIN_EMBEDDED_DART_IO_H_
+#endif  // RUNTIME_BIN_EMBEDDED_DART_IO_H_