Reviewed by Darin.

        - fix http://bugs.webkit.org/show_bug.cgi?id=13775
          REGRESSION: Popup button text should use "natural" directionality to match the items in the popup menu

        Test: fast/forms/select-writing-direction-natural.html

        * platform/PopupMenu.h: Added the static method itemWritingDirectionIsNatural
        which says whether items in the popup ignore the CSS text-align and direction
        properties and instead are left-aligned and use natural writing direction.
        * platform/gdk/PopupMenuGdk.cpp:
        (WebCore::PopupMenu::itemWritingDirectionIsNatural):
        * platform/mac/PopupMenuMac.mm:
        (WebCore::PopupMenu::itemWritingDirectionIsNatural):
        * platform/qt/PopupMenuQt.cpp:
        (WebCore::PopupMenu::itemWritingDirectionIsNatural):
        * platform/win/TemporaryLinkStubs.cpp:
        (WebCore::PopupMenu::itemWritingDirectionIsNatural):
        * platform/wx/TemporaryLinkStubs.cpp:
        (PopupMenu::itemWritingDirectionIsNatural):
        * rendering/RenderMenuList.cpp:
        (WebCore::textDirectionForParagraph): Added this helper function that uses
        the Unicode Bidi Algorithm rules P2 and P3 to determine the writing direction
        of text.
        (WebCore::RenderMenuList::adjustInnerStyle): Made the alignment and direction
        adjustment conditional on the popup implementation.
        (WebCore::RenderMenuList::setText): Added call to adjustInnerStyle() since
        the style depends on the text when natural writing direction is used.

2007-05-30  Mitz Pettel  <mitz@webkit.org>

        Reviewed by Darin.

        - test for http://bugs.webkit.org/show_bug.cgi?id=13775
          REGRESSION: Popup button text should use "natural" directionality to match the items in the popup menu

        * fast/forms/select-writing-direction-natural-expected.checksum: Added.
        * fast/forms/select-writing-direction-natural-expected.png: Added.
        * fast/forms/select-writing-direction-natural-expected.txt: Added.
        * fast/forms/select-writing-direction-natural.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@21900 268f45cc-cd09-0410-ab3c-d52691b4dbfc