Reviewed by Ken.

    Reviewed by Ken.

        <rdar://problem/3990849> AX: textMarkerRange for an AXUIElement within an AXWebArea

        * kwq/KWQAccObject.mm:
        (-[KWQAccObject textMarkerRange]):
        (-[KWQAccObject accessibilityParameterizedAttributeNames]):
        (-[KWQAccObject doAXTextMarkerRangeForUIElement:]):
        (-[KWQAccObject accessibilityAttributeValue:forParameter:]):
        Added AXTextMarkerRangeForUIElement, or you can send textMarkerRange to the UIElement itself.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8683 268f45cc-cd09-0410-ab3c-d52691b4dbfc