Make header include guards great again

runtime/vm/simulator_mips.h

Index: runtime/vm/simulator_mips.h
diff --git a/runtime/vm/simulator_mips.h b/runtime/vm/simulator_mips.h
index cbda735d9472c0cd96c6b3219388e3ae640d44b0..89b7273baa84794157b10ba30f7fc3a840decb52 100644
--- a/runtime/vm/simulator_mips.h
+++ b/runtime/vm/simulator_mips.h
@@ -9,10 +9,10 @@
 // which will start execution in the Simulator or forwards to the real entry
 // on a MIPS HW platform.
 
-#ifndef VM_SIMULATOR_MIPS_H_
-#define VM_SIMULATOR_MIPS_H_
+#ifndef RUNTIME_VM_SIMULATOR_MIPS_H_
+#define RUNTIME_VM_SIMULATOR_MIPS_H_
 
-#ifndef VM_SIMULATOR_H_
+#ifndef RUNTIME_VM_SIMULATOR_H_
 #error Do not include simulator_mips.h directly; use simulator.h.
 #endif
 
@@ -267,4 +267,4 @@ class Simulator {
 
 }  // namespace dart
 
-#endif  // VM_SIMULATOR_MIPS_H_
+#endif  // RUNTIME_VM_SIMULATOR_MIPS_H_