ES6: Add Object.getOwnPropertySymbols

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index e763d435cc985e80a21f0fe43b4e11439c534e6b..bcdc3c3e0ea6f90cad916b23a6850c2b43521d67 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -5743,6 +5743,7 @@ static int LocalPrototypeChainLength(JSObject* obj) {
 
 // Return the names of the local named properties.
 // args[0]: object
+// args[1]: int
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetLocalPropertyNames) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
@@ -5750,8 +5751,9 @@ 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);
+  ASSERT(filter_value >= NONE && filter_value < ABSENT);
+  PropertyAttributes filter = static_cast<PropertyAttributes>(filter_value);
 
   // Skip the global proxy as it has no properties and always delegates to the
   // real global object.