Introduce an API to force the deletion of a property ignoring...

src/runtime.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 369 matching lines @@
   static Object* SetObjectProperty(Handle<Object> object,
                                    Handle<Object> key,
                                    Handle<Object> value,
                                    PropertyAttributes attr);
 
   static Object* ForceSetObjectProperty(Handle<JSObject> object,
                                         Handle<Object> key,
                                         Handle<Object> value,
                                         PropertyAttributes attr);
 
+  static Object* ForceDeleteObjectProperty(Handle<JSObject> object,
+                                           Handle<Object> key);
+
   static Object* GetObjectProperty(Handle<Object> object, Handle<Object> key);
 
   // This function is used in FunctionNameUsing* tests.
   static Object* FindSharedFunctionInfoInScript(Handle<Script> script,
                                                 int position);
 
   // Helper functions used stubs.
   static void PerformGC(Object* result);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_