Tabs with ctrl, meta, or altgraph modifier key down should not advance focus.

        Reviewed by Darin.

        Test: fast/forms/tabs-with-modifiers.html

        * page/EventHandler.cpp:
        (WebCore::EventHandler::defaultKeyboardEventHandler):
        (WebCore::EventHandler::defaultTabEventHandler): bail if ctrl, meta, or altgraph key is down.  
        Clean up the code a bit.
        * page/EventHandler.h:
        * page/FocusController.cpp: Remove the advanceFocus() that takes in a KeyboardEvent.  It was
        only called in EventHandler::defaultTabEventHandler() but we have cleaned up the code there and
        no longer needs it.
        * page/FocusController.h:
        
LayoutTests:
        Tests tabbing with different combinations of modifiers keys, where some
        should advance focus and some should not.

        Reviewed by Darin.

        * fast/forms/tabs-with-modifiers-expected.txt: Added.
        * fast/forms/tabs-with-modifiers.html: Copied from fast/forms/focus2.html.
        


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@29348 268f45cc-cd09-0410-ab3c-d52691b4dbfc