ES6: Add Object.getOwnPropertySymbols

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 0c1c61928ec650f1ad9af7b339673e68cee123db..941d9f37ccad422404de890b78ed7c28affed09a 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -5744,6 +5744,7 @@ static int LocalPrototypeChainLength(JSObject* obj) {
 
 // Return the names of the local named properties.
 // args[0]: object
+// args[1]: int Will be casted to a PropertyAttributes.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetLocalPropertyNames) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
@@ -5751,8 +5752,8 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetLocalPropertyNames) {
     return isolate->heap()->undefined_value();
   }
   CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
-  CONVERT_BOOLEAN_ARG_CHECKED(include_symbols, 1);
-  PropertyAttributes filter = include_symbols ? NONE : SYMBOLIC;
+  CONVERT_SMI_ARG_CHECKED(filter_value, 1);
+  PropertyAttributes filter = static_cast<PropertyAttributes>(filter_value);
 
   // Skip the global proxy as it has no properties and always delegates to the
   // real global object.