Reviewed by Ada Chan.

WebCore: 

* bindings/objc/DOMHTML.mm:
(-[DOMHTMLInputElement _isAutofilled]):
Implemented new cover function.
        
* bindings/objc/DOMPrivate.h:
Declared new cover function.

WebKit/win: 

* DOMHTMLClasses.cpp:
(DOMHTMLInputElement::isAutofilled):
Implemented new cover function.
        
* DOMHTMLClasses.h:
Declared new cover function.
        
* Interfaces/DOMPrivate.idl:
Declared new interface.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@51850 268f45cc-cd09-0410-ab3c-d52691b4dbfc