Disallow Object.observe calls on access-checked objects

src/object-observe.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var $observeEnqueueSpliceRecord;
 var $observeBeginPerformSplice;
 var $observeEndPerformSplice;
 
 var $observeObjectMethods;
 var $observeArrayMethods;
@@ skipping 370 matching lines @@
   }
   return callbackInfo;
 }
 
 
 function ObjectObserve(object, callback, acceptList) {
   if (!IS_SPEC_OBJECT(object))
     throw MakeTypeError(kObserveNonObject, "observe", "observe");
   if (%IsJSGlobalProxy(object))
     throw MakeTypeError(kObserveGlobalProxy, "observe");
+  if (%IsAccessCheckNeeded(object))
+    throw MakeTypeError(kObserveAccessChecked, "observe");
   if (!IS_CALLABLE(callback))
     throw MakeTypeError(kObserveNonFunction, "observe");
   if (ObjectIsFrozen(callback))
     throw MakeTypeError(kObserveCallbackFrozen);
 
   var objectObserveFn = %GetObjectContextObjectObserve(object);
   return objectObserveFn(object, callback, acceptList);
 }
 
 
@@ skipping 208 matching lines @@
   if (IS_SPEC_OBJECT(changeRecord))
     ObjectInfoEnqueueExternalChangeRecord(objectInfo, changeRecord, changeType);
 }
 
 
 function ObjectGetNotifier(object) {
   if (!IS_SPEC_OBJECT(object))
     throw MakeTypeError(kObserveNonObject, "getNotifier", "getNotifier");
   if (%IsJSGlobalProxy(object))
     throw MakeTypeError(kObserveGlobalProxy, "getNotifier");
+  if (%IsAccessCheckNeeded(object))
+    throw MakeTypeError(kObserveAccessChecked, "getNotifier");
 
   if (ObjectIsFrozen(object)) return null;
 
   if (!%ObjectWasCreatedInCurrentOrigin(object)) return null;
 
   var getNotifierFn = %GetObjectContextObjectGetNotifier(object);
   return getNotifierFn(object);
 }
 
 
@@ skipping 78 matching lines @@
   "native_object_get_notifier", NativeObjectGetNotifier,
   "native_object_notifier_perform_change", NativeObjectNotifierPerformChange,
   "native_object_observe", NativeObjectObserve,
   "observers_begin_perform_splice", BeginPerformSplice,
   "observers_end_perform_splice", EndPerformSplice,
   "observers_enqueue_splice", EnqueueSpliceRecord,
   "observers_notify_change", NotifyChange,
 ]);
 
 })