Make header include guards great again

runtime/bin/fdutils.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // 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_FDUTILS_H_
-#define BIN_FDUTILS_H_
+#ifndef RUNTIME_BIN_FDUTILS_H_
+#define RUNTIME_BIN_FDUTILS_H_
 
 #include "bin/builtin.h"
 #include "platform/globals.h"
 
 namespace dart {
 namespace bin {
 
 class FDUtils {
  public:
   static bool SetCloseOnExec(intptr_t fd);
@@ skipping 23 matching lines @@
   static ssize_t WriteToBlocking(int fd, const void* buffer, size_t count);
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(FDUtils);
 };
 
 }  // namespace bin
 }  // namespace dart
 
-#endif  // BIN_FDUTILS_H_
+#endif  // RUNTIME_BIN_FDUTILS_H_