Make header include guards great again

runtime/vm/hash_map.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 VM_HASH_MAP_H_
-#define VM_HASH_MAP_H_
+#ifndef RUNTIME_VM_HASH_MAP_H_
+#define RUNTIME_VM_HASH_MAP_H_
 
 #include "vm/growable_array.h"  // For Malloc, EmptyBase
 #include "vm/zone.h"
 
 namespace dart {
 
 template<typename KeyValueTrait, typename B, typename Allocator = Zone>
 class BaseDirectChainedHashMap : public B {
  public:
   explicit BaseDirectChainedHashMap(Allocator* allocator)
@@ skipping 363 matching lines @@
   };
 
   static Key KeyOf(Pair kv) { return kv.key; }
   static Value ValueOf(Pair kv) { return kv.value; }
   static intptr_t Hashcode(Key key) { return reinterpret_cast<intptr_t>(key); }
   static bool IsKeyEqual(Pair kv, Key key) { return kv.key == key; }
 };
 
 }  // namespace dart
 
-#endif  // VM_HASH_MAP_H_
+#endif  // RUNTIME_VM_HASH_MAP_H_