Make header include guards great again

runtime/vm/regexp_interpreter.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.
 
 // A simple interpreter for the Irregexp byte code.
 
-#ifndef VM_REGEXP_INTERPRETER_H_
-#define VM_REGEXP_INTERPRETER_H_
+#ifndef RUNTIME_VM_REGEXP_INTERPRETER_H_
+#define RUNTIME_VM_REGEXP_INTERPRETER_H_
 
 #include "vm/allocation.h"
 #include "vm/object.h"
 #include "vm/zone.h"
 
 namespace dart {
 
 class IrregexpInterpreter : public AllStatic {
  public:
   enum IrregexpResult {
     RE_FAILURE = 0,
     RE_SUCCESS = 1,
     RE_EXCEPTION = -1
   };
 
   static IrregexpResult Match(const TypedData& bytecode,
                               const String& subject,
                               int32_t* captures,
                               intptr_t start_position,
                               Zone* zone);
 };
 
 }  // namespace dart
 
-#endif  // VM_REGEXP_INTERPRETER_H_
+#endif  // RUNTIME_VM_REGEXP_INTERPRETER_H_