Reviewed by Hyatt.

    Reviewed by Hyatt.

        <rdar://problem/5242145> REGRESSION: Clicking on symbol in documentation often doesn't scroll to symbol

        A renderer for the anchor wasn't always available at the time parsing finished. So we need
        to bail out of gotoAnchor if stylesheets are pending and remember to call gotoAnchor later
        once all of the pending stylesheets load.

        * dom/Document.cpp:
        (WebCore::Document::Document): Initialize m_gotoAnchorNeededAfterStylesheetsLoad to false.
        (WebCore::Document::stylesheetLoaded): If we have no more pending stylesheets, call gotoAnchor if needed.
        * dom/Document.h:
        (WebCore::Document::gotoAnchorNeededAfterStylesheetsLoad): New method.
        (WebCore::Document::setGotoAnchorNeededAfterStylesheetsLoad): Ditto.
        * loader/FrameLoader.cpp:
        (WebCore::FrameLoader::gotoAnchor): Bail early if the document still has pending stylesheets.
        * loader/FrameLoader.h: Make gotoAnchor() public.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@24550 268f45cc-cd09-0410-ab3c-d52691b4dbfc