Reduce IAccessibleTabListBox to what's actually used

...the calls to getAccessibleChild(0) and getHeaderBar(BBYTE_COLUMNHEADERBAR)
ultimately all ended up at
AccessibleBrowseBox::implGetHeaderBar(BBTYPE_COLUMNHEADERBAR).

Change-Id: Ie25659e19d0d1ce2dcde2d1440ecc69b4fa265b0

accessibility/inc/accessibility/extended/accessibletablistbox.hxx

@@ -83,9 +83,9 @@ public:
     }
 
     ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
-        getHeaderBar( ::svt::AccessibleBrowseBoxObjType _eObjType )
+        getHeaderBar()
     {
-        return AccessibleBrowseBox::getHeaderBar( _eObjType );
+        return AccessibleBrowseBox::getHeaderBar( svt::BBTYPE_COLUMNHEADERBAR );
     }
 
 protected:

include/svtools/accessibletableprovider.hxx

@@ -145,14 +145,10 @@ public:
     virtual css::uno::Reference< css::accessibility::XAccessible >
         getMyself() = 0;
 
-    virtual css::uno::Reference< css::accessibility::XAccessible >
-        SAL_CALL getAccessibleChild( sal_Int32 nChildIndex )
-            throw ( css::lang::IndexOutOfBoundsException, css::uno::RuntimeException, std::exception ) = 0;
-
-    /** returns the accessible object for the row or the column header bar
+    /** returns the accessible object for the column header bar
     */
     virtual css::uno::Reference< css::accessibility::XAccessible >
-        getHeaderBar( ::svt::AccessibleBrowseBoxObjType _eObjType ) = 0;
+        getHeaderBar() = 0;
 
 protected:
     ~IAccessibleTabListBox() {}

svtools/source/contnr/svtabbx.cxx

@@ -921,10 +921,10 @@ Reference< XAccessible > SvHeaderTabListBox::CreateAccessibleCell( sal_Int32 _nR
         sal_Bool bIsCheckBox = IsCellCheckBox( _nRow, _nColumnPos, eState );
         if ( bIsCheckBox )
             xChild = m_pImpl->m_aFactoryAccess.getFactory().createAccessibleCheckBoxCell(
-                m_pAccessible->getAccessibleChild( 0 ), *this, NULL, _nRow, _nColumnPos, eState, false );
+                m_pAccessible->getHeaderBar(), *this, NULL, _nRow, _nColumnPos, eState, false );
         else
             xChild = m_pImpl->m_aFactoryAccess.getFactory().createAccessibleBrowseBoxTableCell(
-                m_pAccessible->getAccessibleChild( 0 ), *this, NULL, _nRow, _nColumnPos, OFFSET_NONE );
+                m_pAccessible->getHeaderBar(), *this, NULL, _nRow, _nColumnPos, OFFSET_NONE );
 
         // insert into list
         if ( !AreChildrenTransient() )
@@ -958,7 +958,7 @@ Reference< XAccessible > SvHeaderTabListBox::CreateAccessibleColumnHeader( sal_u
     {
         // no -> create new header cell
         xChild = m_pImpl->m_aFactoryAccess.getFactory().createAccessibleBrowseBoxHeaderCell(
-            _nColumn, m_pAccessible->getHeaderBar( ::svt::BBTYPE_COLUMNHEADERBAR ),
+            _nColumn, m_pAccessible->getHeaderBar(),
             *this, NULL, ::svt::BBTYPE_COLUMNHEADERCELL
         );