Revert of "[es6] Partially implement Reflect.ownKeys."

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 15d53c873a47c746d7c818dc1c67a523e931a3a9..7695ccc753f731932de907b74bced1951eace638 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1640,29 +1640,6 @@ BUILTIN(ReflectIsExtensible) {
 }
 
 
-// ES6 section 26.1.11 Reflect.ownKeys
-BUILTIN(ReflectOwnKeys) {
-  HandleScope scope(isolate);
-  DCHECK_EQ(2, args.length());
-  Handle<Object> target = args.at<Object>(1);
-
-  if (!target->IsJSReceiver()) {
-    THROW_NEW_ERROR_RETURN_FAILURE(
-        isolate, NewTypeError(MessageTemplate::kCalledOnNonObject,
-                              isolate->factory()->NewStringFromAsciiChecked(
-                                  "Reflect.ownKeys")));
-  }
-
-  Handle<FixedArray> keys;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, keys,
-      JSReceiver::GetKeys(Handle<JSReceiver>::cast(target),
-                          JSReceiver::OWN_ONLY, INCLUDE_SYMBOLS,
-                          CONVERT_TO_STRING, IGNORE_ENUMERABILITY));
-  return *isolate->factory()->NewJSArrayWithElements(keys);
-}
-
-
 // ES6 section 26.1.12 Reflect.preventExtensions
 BUILTIN(ReflectPreventExtensions) {
   HandleScope scope(isolate);