Reviewed by Martin Robinson.

        [Gtk] Consistent crash from Google/ARIA combobox click
        https://bugs.webkit.org/show_bug.cgi?id=55883

        Added new layout test to check this doesn't crash anymore in GTK.

        * platform/gtk/accessibility/aria-options-and-menuitems-crash-expected.txt: Added.
        * platform/gtk/accessibility/aria-options-and-menuitems-crash.html: Added.
2011-03-29  Mario Sanchez Prada  <msanchez@igalia.com>

        Reviewed by Martin Robinson.

        [Gtk] Consistent crash from Google/ARIA combobox click
        https://bugs.webkit.org/show_bug.cgi?id=55883

        Do not call to firstChild() to avoid entering into infinite loops.

        This would happen when current item is a WebCore Group and some of
        its children have either role 'option' or 'menuitem'. Other than
        that the logic behind that call to firstChild() seems to be no
        longer needed so it's safe to remove it.

        Test: platform/gtk/accessibility/aria-options-and-menuitems-crash.html

        * accessibility/gtk/AccessibilityObjectAtk.cpp:
        (WebCore::AccessibilityObject::accessibilityPlatformIncludesObject):
        Remove call to firsChild, which was leading to crashes sometimes.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@82296 268f45cc-cd09-0410-ab3c-d52691b4dbfc