use a typedef to reduce code duplication

Change-Id: I915b88ad0683cecaf2018a529fb904753a4f27c0

fpicker/source/aqua/SalAquaFilePicker.hxx

@@ -47,12 +47,14 @@
 // class declaration
 //----------------------------------------------------------
 
+typedef ::cppu::WeakComponentImplHelper3 <
+            ::com::sun::star::ui::dialogs::XFilePicker3,
+            ::com::sun::star::ui::dialogs::XFilePickerControlAccess,
+           ::com::sun::star::lang::XServiceInfo >  SalAquaFilePicker_Base;
+
 class SalAquaFilePicker :
     public SalAquaPicker,
-    public cppu::WeakComponentImplHelper3<
-    ::com::sun::star::ui::dialogs::XFilePicker3,
-    ::com::sun::star::ui::dialogs::XFilePickerControlAccess,
-    ::com::sun::star::lang::XServiceInfo >
+    public SalAquaFilePicker_Base
 {
 public:
 

fpicker/source/aqua/SalAquaFilePicker.mm

@@ -93,10 +93,7 @@ namespace
 //-----------------------------------------------------------------------------------------
 
 SalAquaFilePicker::SalAquaFilePicker()
-  : cppu::WeakComponentImplHelper3<
-             XFilePicker3,
-             XFilePickerControlAccess,
-             lang::XServiceInfo>( m_rbHelperMtx )
+  : SalAquaFilePicker_Base( m_rbHelperMtx )
    , m_pFilterHelper( NULL )
 {
     DBG_PRINT_ENTRY(CLASS_NAME, __func__);