ES6 Unscopables

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index b0e7faea900793a6a7464f95af7245d8bb913fbd..a4bf30372679d1455e0115a5d33100fe5bcc153f 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1522,6 +1522,9 @@ class Object {
       Handle<JSReceiver> setter,
       Handle<Object> value);
 
+  MUST_USE_RESULT static MaybeHandle<Object> GetPropertyForUnscopables(
+      LookupIterator* it);
+
   MUST_USE_RESULT static inline MaybeHandle<Object> GetElement(
       Isolate* isolate,
       Handle<Object> object,
@@ -1589,6 +1592,10 @@ class Object {
 #endif
 
  private:
+  // Helper for GetProperty and GetPropertyForUnscopables.
+  MUST_USE_RESULT static MaybeHandle<Object> GetPropertyHelper(
+      LookupIterator* it, bool force_holder_as_receiver_for_accessor_callback);
+
   friend class LookupIterator;
   friend class PrototypeIterator;