Make header include guards great again

runtime/vm/simulator_arm64.h

 // Copyright (c) 2014, 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.
 
 // Declares a Simulator for ARM64 instructions if we are not generating a native
 // ARM64 binary. This Simulator allows us to run and debug ARM64 code generation
 // on regular desktop machines.
 // Dart calls into generated code by "calling" the InvokeDartCode stub,
 // which will start execution in the Simulator or forwards to the real entry
 // on a ARM64 HW platform.
 
-#ifndef VM_SIMULATOR_ARM64_H_
-#define VM_SIMULATOR_ARM64_H_
+#ifndef RUNTIME_VM_SIMULATOR_ARM64_H_
+#define RUNTIME_VM_SIMULATOR_ARM64_H_
 
-#ifndef VM_SIMULATOR_H_
+#ifndef RUNTIME_VM_SIMULATOR_H_
 #error Do not include simulator_arm64.h directly; use simulator.h.
 #endif
 
 #include "vm/constants_arm64.h"
 
 namespace dart {
 
 class Isolate;
 class Mutex;
 class RawObject;
@@ skipping 249 matching lines @@
     last_setjmp_buffer_ = buffer;
   }
 
   friend class SimulatorDebugger;
   friend class SimulatorSetjmpBuffer;
   DISALLOW_COPY_AND_ASSIGN(Simulator);
 };
 
 }  // namespace dart
 
-#endif  // VM_SIMULATOR_ARM64_H_
+#endif  // RUNTIME_VM_SIMULATOR_ARM64_H_