[proxies] allow duplicate keys for [[OwnPropertyKeys]] trap.

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index d5e57562551a8944b11cc613909bd349c03ac9be..3eee48611f4f962d788406029473f2a64d45e8a8 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -723,8 +723,8 @@ RUNTIME_FUNCTION(Runtime_GetOwnPropertyKeys) {
 
   Handle<FixedArray> keys;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, keys, JSReceiver::GetKeys(object, JSReceiver::OWN_ONLY, filter,
-                                         CONVERT_TO_STRING));
+      isolate, keys, JSReceiver::GetKeys(object, KeyCollectionType::OWN_ONLY,
+                                         filter, CONVERT_TO_STRING));
 
   return *isolate->factory()->NewJSArrayWithElements(keys);
 }