Fix CFWL_WidgetImpDelegate hierarchy.

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

Index: xfa/src/fwl/src/basewidget/include/fwl_tooltipctrlimp.h
diff --git a/xfa/src/fwl/src/basewidget/include/fwl_tooltipctrlimp.h b/xfa/src/fwl/src/basewidget/include/fwl_tooltipctrlimp.h
index c652346e5106ac48a6910665e60b79988e58fd54..1764fc05c58cbcc817b104923908826b9f6587bb 100644
--- a/xfa/src/fwl/src/basewidget/include/fwl_tooltipctrlimp.h
+++ b/xfa/src/fwl/src/basewidget/include/fwl_tooltipctrlimp.h
@@ -67,10 +67,10 @@ class CFWL_ToolTipImp : public CFWL_FormImp {
 class CFWL_ToolTipImpDelegate : public CFWL_WidgetImpDelegate {
  public:
   CFWL_ToolTipImpDelegate(CFWL_ToolTipImp* 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);