Reviewed by Geoff.

    Reviewed by Geoff.

        - fix http://bugzilla.opendarwin.org/show_bug.cgi?id=9811
          rdar://problem/4619572
          OPTION text contained in OPTGROUP appears at the wrong size

        * dom/Node.h:
        * dom/Node.cpp: (WebCore::Node::renderStyle): Made a const member function.
        The derived classes were overriding with const member functions, and I could
        change either this or the derived -- decided to do this.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@15330 268f45cc-cd09-0410-ab3c-d52691b4dbfc