Handlify JSObject::AllocateStorageForMap method.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index e7c4cc9069ee62c0a93dabd976ded0bd26daa97c..c7ca1811ef1b0ebd2c53d44eaedbe556012f20d7 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -348,10 +348,8 @@ MaybeObject* TransitionElements(Handle<Object> object,
   ElementsKind from_kind =
       Handle<JSObject>::cast(object)->map()->elements_kind();
   if (Map::IsValidElementsTransition(from_kind, to_kind)) {
-    Handle<Object> result = JSObject::TransitionElementsKind(
-        Handle<JSObject>::cast(object), to_kind);
-    if (result.is_null()) return isolate->ThrowIllegalOperation();
-    return *result;
+    JSObject::TransitionElementsKind(Handle<JSObject>::cast(object), to_kind);
+    return *object;
   }
   return isolate->ThrowIllegalOperation();
 }