Store mode for keyed stores should be passed in from type feedback

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 6128942974e76a01518c74090552c3cf61b8651c..2b9fd96ee229c961dcadbf797bd41b16b9eced08 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1225,10 +1225,9 @@ class HGraphBuilder {
                                    bool is_jsarray);
 
   HInstruction* BuildUncheckedMonomorphicElementAccess(
-      HValue* object,
+      HValue* checked_object,
       HValue* key,
       HValue* val,
-      HCheckMaps* mapcheck,
       bool is_js_array,
       ElementsKind elements_kind,
       bool is_store,
@@ -1982,6 +1981,8 @@ class HOptimizedGraphBuilder V8_FINAL
                                                 HValue* val,
                                                 SmallMapList* maps);
 
+  LoadKeyedHoleMode BuildKeyedHoleMode(Handle<Map> map);
+
   HInstruction* BuildMonomorphicElementAccess(HValue* object,
                                               HValue* key,
                                               HValue* val,