Adding GetMoreGeneralElementsKind in elements-kind.h

src/lookup.cc

Index: src/lookup.cc
diff --git a/src/lookup.cc b/src/lookup.cc
index 013d074d7714c017e7122ef432b04693f55fa2e7..e9dc3d3a931863bb7eac1059d814b27a9ed43d2d 100644
--- a/src/lookup.cc
+++ b/src/lookup.cc
@@ -134,7 +134,7 @@ void LookupIterator::PrepareForDataProperty(Handle<Object> value) {
     ElementsKind kind = holder_map_->elements_kind();
     ElementsKind to = value->OptimalElementsKind();
     if (IsHoleyElementsKind(kind)) to = GetHoleyElementsKind(to);
-    to = IsMoreGeneralElementsKindTransition(kind, to) ? to : kind;
+    to = GetMoreGeneralElementsKind(kind, to);
     JSObject::TransitionElementsKind(holder, to);
     holder_map_ = handle(holder->map(), isolate_);