Cleanup IFWL_Widget visibility and virtual parameters

xfa/fwl/core/ifwl_tooltip.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef XFA_FWL_CORE_IFWL_TOOLTIP_H_
 #define XFA_FWL_CORE_IFWL_TOOLTIP_H_
 
 #include "xfa/fwl/core/ifwl_form.h"
@@ skipping 23 matching lines @@
 
 class IFWL_ToolTip : public IFWL_Form {
  public:
   IFWL_ToolTip(const IFWL_App* app,
                std::unique_ptr<CFWL_WidgetProperties> properties,
                IFWL_Widget* pOuter);
   ~IFWL_ToolTip() override;
 
   // IFWL_Widget
   FWL_Type GetClassID() const override;
-  FWL_Error GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
-  FWL_Error Update() override;
-  FWL_Error DrawWidget(CFX_Graphics* pGraphics,
-                       const CFX_Matrix* pMatrix = nullptr) override;
+  void GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
+  void Update() override;
+  void DrawWidget(CFX_Graphics* pGraphics,
+                  const CFX_Matrix* pMatrix = nullptr) override;
   void SetStates(uint32_t dwStates, bool bSet) override;
-  FWL_Error GetClientRect(CFX_RectF& rect) override;
+  void GetClientRect(CFX_RectF& rect) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix) override;
 
   void SetAnchor(const CFX_RectF& rtAnchor);
   void Show();
   void Hide();
 
  protected:
   class Timer : public IFWL_Timer {
    public:
@@ skipping 27 matching lines @@
  private:
   void OnFocusChanged(CFWL_Message* pMsg, bool bSet);
   void OnLButtonDown(CFWL_MsgMouse* pMsg);
   void OnLButtonUp(CFWL_MsgMouse* pMsg);
   void OnMouseMove(CFWL_MsgMouse* pMsg);
   void OnMouseLeave(CFWL_MsgMouse* pMsg);
   void OnKeyDown(CFWL_MsgKey* pMsg);
 };
 
 #endif  // XFA_FWL_CORE_IFWL_TOOLTIP_H_