Fix CFWL_WidgetImpDelegate hierarchy.

xfa/src/fwl/src/basewidget/include/fwl_monthcalendarimp.h

Index: xfa/src/fwl/src/basewidget/include/fwl_monthcalendarimp.h
diff --git a/xfa/src/fwl/src/basewidget/include/fwl_monthcalendarimp.h b/xfa/src/fwl/src/basewidget/include/fwl_monthcalendarimp.h
index 7cc1a19724020648c9c292b717bd5085dbd63cc0..053384a0417de0fd45cdeefdae3b4fec8cd6c698 100644
--- a/xfa/src/fwl/src/basewidget/include/fwl_monthcalendarimp.h
+++ b/xfa/src/fwl/src/basewidget/include/fwl_monthcalendarimp.h
@@ -233,9 +233,9 @@ typedef struct _DATEINFO {
 class CFWL_MonthCalendarImpDelegate : public CFWL_WidgetImpDelegate {
  public:
   CFWL_MonthCalendarImpDelegate(CFWL_MonthCalendarImp* pOwner);
-  virtual int32_t OnProcessMessage(CFWL_Message* pMessage);
-  virtual FWL_ERR OnDrawWidget(CFX_Graphics* pGraphics,
-                               const CFX_Matrix* pMatrix = NULL);
+  int32_t OnProcessMessage(CFWL_Message* pMessage) override;
+  FWL_ERR OnDrawWidget(CFX_Graphics* pGraphics,
+                       const CFX_Matrix* pMatrix = NULL) override;
 
  protected:
   void OnActivate(CFWL_Message* pMsg);