Move runtime helper for ToName conversion onto Object.

src/runtime/runtime-classes.cc

Index: src/runtime/runtime-classes.cc
diff --git a/src/runtime/runtime-classes.cc b/src/runtime/runtime-classes.cc
index c485759a191ba7fbab6e5755293830a53f5b6108..97661113ad75ce494957d2a76da2e39626f885dd 100644
--- a/src/runtime/runtime-classes.cc
+++ b/src/runtime/runtime-classes.cc
@@ -380,7 +380,7 @@ RUNTIME_FUNCTION(Runtime_LoadKeyedFromSuper) {
 
   Handle<Name> name;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, name,
-                                     Runtime::ToName(isolate, key));
+                                     Object::ToName(isolate, key));
   // TODO(verwaest): Unify using LookupIterator.
   if (name->AsArrayIndex(&index)) {
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
@@ -477,7 +477,7 @@ static Object* StoreKeyedToSuper(Isolate* isolate, Handle<JSObject> home_object,
   }
   Handle<Name> name;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, name,
-                                     Runtime::ToName(isolate, key));
+                                     Object::ToName(isolate, key));
   // TODO(verwaest): Unify using LookupIterator.
   if (name->AsArrayIndex(&index)) {
     return StoreElementToSuper(isolate, home_object, receiver, index, value,