Mirrors memory usage tweaks.

runtime/lib/mirrors.h

 // Copyright (c) 2011, 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 LIB_MIRRORS_H_
 #define LIB_MIRRORS_H_
 
+#include "vm/allocation.h"
+
 namespace dart {
 
+class Mirrors : public AllStatic {
+ public:
+  #define MIRRORS_KIND_SHIFT_LIST(V)                                           \
+    V(kAbstract)                                                               \
+    V(kGetter)                                                                 \
+    V(kSetter)                                                                 \
+    V(kConstructor)                                                            \
+    V(kConstCtor)                                                              \
+    V(kGenerativeCtor)                                                         \
+    V(kRedirectingCtor)                                                        \
+    V(kFactoryCtor)                                                            \
+
+  // These offsets much be kept in sync with those in mirrors_impl.dart.
+  enum KindShifts {
+  #define DEFINE_KIND_SHIFT_ENUM(name) name,
+  MIRRORS_KIND_SHIFT_LIST(DEFINE_KIND_SHIFT_ENUM)
+  #undef DEFINE_KIND_SHIFT_ENUM
+  };
+};
+
 }  // namespace dart
 
 #endif  // LIB_MIRRORS_H_