Move runtime helper for ToName conversion onto Object.

src/runtime/runtime-forin.cc

Index: src/runtime/runtime-forin.cc
diff --git a/src/runtime/runtime-forin.cc b/src/runtime/runtime-forin.cc
index ecd55d172ae614318a7feb441f317616c8c49c2c..ff6804c8fb6527ee7f9624a7e16ebd9e2c588cea 100644
--- a/src/runtime/runtime-forin.cc
+++ b/src/runtime/runtime-forin.cc
@@ -28,7 +28,7 @@ RUNTIME_FUNCTION(Runtime_ForInFilter) {
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
   // TODO(turbofan): Fast case for array indices.
   Handle<Name> name;
-  if (!Runtime::ToName(isolate, key).ToHandle(&name)) {
+  if (!Object::ToName(isolate, key).ToHandle(&name)) {
     return isolate->heap()->exception();
   }
   Maybe<bool> result = JSReceiver::HasProperty(receiver, name);
@@ -53,7 +53,7 @@ RUNTIME_FUNCTION(Runtime_ForInNext) {
   }
   // TODO(turbofan): Fast case for array indices.
   Handle<Name> name;
-  if (!Runtime::ToName(isolate, key).ToHandle(&name)) {
+  if (!Object::ToName(isolate, key).ToHandle(&name)) {
     return isolate->heap()->exception();
   }
   Maybe<bool> result = JSReceiver::HasProperty(receiver, name);