<rdar://problem/5359921> WebCore should maintain a dirty flag for confirmation on unsaved changes

        * bindings/objc/DOMHTML.mm:
        (-[DOMHTMLInputElement _isUserEdited]):
        (-[DOMHTMLTextAreaElement _isUserEdited]):
        Renamed _isEdited to _isUserEdited since the functionality is now different
        
        * bindings/objc/DOMPrivate.h:
        Renamed _isEdited to _isUserEdited.
        
        * rendering/RenderTextControl.cpp:
        (WebCore::RenderTextControl::RenderTextControl):
        Defaulted m_userEdited to false
        
        (WebCore::RenderTextControl::updateFromElement):
        Set m_userEdited to false, since the change wasn't triggered first by an edit
        
        (WebCore::RenderTextControl::subtreeHasChanged):
        Set m_userEdited to true, since it has been touched by the user
        
        * rendering/RenderTextControl.h:
        (WebCore::RenderTextControl::isUserEdited):
        (WebCore::RenderTextControl::setUserEdited):
        Added two new methods to set/return the userEdited boolean value.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@24652 268f45cc-cd09-0410-ab3c-d52691b4dbfc