Fix CFWL_WidgetImpDelegate hierarchy.

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

Index: xfa/src/fwl/src/basewidget/include/fwl_spinbuttonimp.h
diff --git a/xfa/src/fwl/src/basewidget/include/fwl_spinbuttonimp.h b/xfa/src/fwl/src/basewidget/include/fwl_spinbuttonimp.h
index f196b37f51838d9ac39176b96d897a18a51a6c52..6b42d2fc73c97b93c4028203744adda8fbc16d9c 100644
--- a/xfa/src/fwl/src/basewidget/include/fwl_spinbuttonimp.h
+++ b/xfa/src/fwl/src/basewidget/include/fwl_spinbuttonimp.h
@@ -52,10 +52,10 @@ class CFWL_SpinButtonImp : public CFWL_WidgetImp, public IFWL_Timer {
 class CFWL_SpinButtonImpDelegate : public CFWL_WidgetImpDelegate {
  public:
   CFWL_SpinButtonImpDelegate(CFWL_SpinButtonImp* pOwner);
-  virtual int32_t OnProcessMessage(CFWL_Message* pMessage);
-  virtual FWL_ERR OnProcessEvent(CFWL_Event* pEvent);
-  virtual FWL_ERR OnDrawWidget(CFX_Graphics* pGraphics,
-                               const CFX_Matrix* pMatrix = NULL);
+  int32_t OnProcessMessage(CFWL_Message* pMessage) override;
+  FWL_ERR OnProcessEvent(CFWL_Event* pEvent) override;
+  FWL_ERR OnDrawWidget(CFX_Graphics* pGraphics,
+                       const CFX_Matrix* pMatrix = NULL) override;
 
  protected:
   void OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet = TRUE);