[runtime] PreventExtensionsWithTransition: before adding the new

src/objects.h

 // Copyright 2015 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 2462 matching lines @@
   // the caller to initialize object header. Fill the pre-allocated fields with
   // pre_allocated_value and the rest with filler_value.
   // Note: this call does not update write barrier, the caller is responsible
   // to ensure that |filler_value| can be collected without WB here.
   inline void InitializeBody(Map* map, int start_offset,
                              Object* pre_allocated_value, Object* filler_value);
 
   // Check whether this object references another object
   bool ReferencesObject(Object* obj);
 
+  MUST_USE_RESULT static Maybe<bool> TestIntegrityLevel(Handle<JSObject> object,
+                                                        IntegrityLevel lvl);
+
   MUST_USE_RESULT static Maybe<bool> PreventExtensions(
       Handle<JSObject> object, ShouldThrow should_throw);
 
   static bool IsExtensible(Handle<JSObject> object);
 
   // Copy object.
   enum DeepCopyHints { kNoHints = 0, kObjectIsShallow = 1 };
 
   MUST_USE_RESULT static MaybeHandle<JSObject> DeepCopy(
       Handle<JSObject> object,
@@ skipping 4774 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_