Change DefineOrRedefineDataProperty to use local lookup (fix issue 1435).

This prevents us from normalizing when we do not need to.
Review URL: http://codereview.chromium.org/7168012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8296 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/runtime.cc

@@ -3905,7 +3905,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DefineOrRedefineDataProperty) {
   }
 
   LookupResult result;
-  js_object->LookupRealNamedProperty(*name, &result);
+  js_object->LocalLookupRealNamedProperty(*name, &result);
 
   // To be compatible with safari we do not change the value on API objects
   // in defineProperty. Firefox disagrees here, and actually changes the value.