Make header include guards great again

runtime/vm/thread_registry.h

 // Copyright (c) 2015, 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 VM_THREAD_REGISTRY_H_
-#define VM_THREAD_REGISTRY_H_
+#ifndef RUNTIME_VM_THREAD_REGISTRY_H_
+#define RUNTIME_VM_THREAD_REGISTRY_H_
 
 #include "vm/globals.h"
 #include "vm/growable_array.h"
 #include "vm/isolate.h"
 #include "vm/lockers.h"
 #include "vm/stack_frame.h"
 #include "vm/thread.h"
 
 namespace dart {
 
@@ skipping 43 matching lines @@
   // added.
   Thread* mutator_thread_;
 
   friend class Isolate;
   friend class SafepointHandler;
   DISALLOW_COPY_AND_ASSIGN(ThreadRegistry);
 };
 
 }  // namespace dart
 
-#endif  // VM_THREAD_REGISTRY_H_
+#endif  // RUNTIME_VM_THREAD_REGISTRY_H_