Reviewed by John.

    Reviewed by John.

        - fixed <rdar://problem/3974246> REGRESSION (125-180): popup menus are missing item text on Harmony Remote web site

        * khtml/html/html_formimpl.cpp: (DOM::HTMLOptionElementImpl::text): Change this function to traverse the entire tree
        and gather all the text rather than just looking at immediate children.

        * khtml/xml/dom_nodeimpl.h: Added const.
        * khtml/xml/dom_nodeimpl.cpp:
        (NodeImpl::traverseNextNode): Added const.
        (NodeImpl::traverseNextSibling): Ditto.
        (NodeImpl::traversePreviousNodePostOrder): Ditto.
        (NodeImpl::detach): Add a missing nil check.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8478 268f45cc-cd09-0410-ab3c-d52691b4dbfc