Improve load IC so it can call a native accessor even if the holder is

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
===================================================================
--- src/hydrogen-instructions.cc	(revision 12254)
+++ src/hydrogen-instructions.cc	(working copy)
@@ -1743,6 +1743,10 @@
           break;
       }
     } else if (lookup.IsCacheable() &&
+               // For dicts the lookup on the map will fail, but the object may
+               // contain the property so we cannot generate a negative lookup
+               // (which would just be a map check and return undefined).
+               !map->is_dictionary_map() &&
                PrototypeChainCanNeverResolve(map, name)) {
       negative_lookups.Add(types->at(i), zone);
     }