Initial steps for moving code onto Map

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4698 matching lines @@
 
 
 // The cache for maps used by normalized (dictionary mode) objects.
 // Such maps do not have property descriptors, so a typical program
 // needs very limited number of distinct normalized maps.
 class NormalizedMapCache: public FixedArray {
  public:
   static const int kEntries = 64;
 
   static Handle<Map> Get(Handle<NormalizedMapCache> cache,
-                         Handle<JSObject> object,
+                         Handle<Map> fast_map,
                          PropertyNormalizationMode mode);
 
   void Clear();
 
   // Casting
   static inline NormalizedMapCache* cast(Object* obj);
 
   DECLARE_VERIFIER(NormalizedMapCache)
 };
 
@@ skipping 6294 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_