GetKeys(): Revert all-can-read behavior for Object.keys until LayoutTests are fixed

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 13b3918332a888f85a7318f23285fedf9fa52d93..16f7e6f31994820010d2e9c9ac7531bef7ec0925 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -8191,6 +8191,11 @@ static bool GetKeysFromJSObject(Isolate* isolate, Handle<JSReceiver> receiver,
     DCHECK(type == JSReceiver::OWN_ONLY);
     filter = static_cast<PropertyFilter>(filter | ONLY_ALL_CAN_READ);
     keep_going = false;
+
+    // TODO(jkummerow): LayoutTests need adaptation before we can be spec
+    // compliant.
+    // Let [[OwnPropertyKeys]] also return an empty list for now.
+    return false;
   }
 
   JSObject::CollectOwnElementKeys(object, accumulator, filter);