Fix and clean up treatment of hidden prototypes.

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 1498 matching lines @@
   // Set the object's prototype (only JSReceiver and null are allowed).
   MUST_USE_RESULT MaybeObject* SetPrototype(Object* value,
                                             bool skip_hidden_prototypes);
 
   // Retrieves a permanent object identity hash code. The undefined value might
   // be returned in case no hash was created yet and OMIT_CREATION was used.
   inline MUST_USE_RESULT MaybeObject* GetIdentityHash(CreationFlag flag);
 
   // Lookup a property.  If found, the result is valid and has
   // detailed information.
-  void LocalLookup(String* name, LookupResult* result);
+  void LocalLookup(String* name, LookupResult* result,
+                   bool search_hidden_prototypes = false);
   void Lookup(String* name, LookupResult* result);
 
  protected:
   Smi* GenerateIdentityHash();
 
  private:
   PropertyAttributes GetPropertyAttributeForResult(JSReceiver* receiver,
                                                    LookupResult* result,
                                                    String* name,
                                                    bool continue_search);
@@ skipping 7472 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_