Make code compile with clang_use_chrome_plugin (part VI)

xfa/fwl/lightwidget/cfwl_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_LIGHTWIDGET_CFWL_TOOLTIP_H_
 #define XFA_FWL_LIGHTWIDGET_CFWL_TOOLTIP_H_
 
 #include "xfa/fwl/basewidget/ifwl_tooltip.h"
 #include "xfa/fwl/lightwidget/cfwl_widget.h"
 
 class CFWL_ToolTip : public CFWL_Widget {
  public:
+  CFWL_ToolTip();
+  ~CFWL_ToolTip() override;
+
   static CFWL_ToolTip* Create();
 
-  CFWL_ToolTip();
-  virtual ~CFWL_ToolTip();
-
   FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = nullptr);
 
   void GetCaption(CFX_WideString& wsCaption);
   void SetCaption(const CFX_WideStringC& wsCaption);
 
   int32_t GetInitialDelay();
   void SetInitialDelay(int32_t nDelayTime);
 
   int32_t GetAutoPopDelay();
   void SetAutoPopDelay(int32_t nDelayTime);
 
   CFX_DIBitmap* GetToolTipIcon();
   void SetToolTipIcon(CFX_DIBitmap* pBitmap);
   CFX_SizeF GetToolTipIconSize();
   void SetToolTipIconSize(CFX_SizeF fSize);
 
   void SetAnchor(const CFX_RectF& rtAnchor);
   void Show();
   void Hide();
 
  protected:
   class CFWL_ToolTipDP : public IFWL_ToolTipDP {
    public:
     CFWL_ToolTipDP();
-    FWL_Error GetCaption(IFWL_Widget* pWidget, CFX_WideString& wsCaption);
-    int32_t GetInitialDelay(IFWL_Widget* pWidget);
-    int32_t GetAutoPopDelay(IFWL_Widget* pWidget);
-    CFX_DIBitmap* GetToolTipIcon(IFWL_Widget* pWidget);
-    CFX_SizeF GetToolTipIconSize(IFWL_Widget* pWidget);
+    ~CFWL_ToolTipDP() override;
+
+    // IFWL_DataProvider
+    FWL_Error GetCaption(IFWL_Widget* pWidget,
+                         CFX_WideString& wsCaption) override;
+
+    // IFWL_ToolTipDP
+    int32_t GetInitialDelay(IFWL_Widget* pWidget) override;
+    int32_t GetAutoPopDelay(IFWL_Widget* pWidget) override;
+    CFX_DIBitmap* GetToolTipIcon(IFWL_Widget* pWidget) override;
+    CFX_SizeF GetToolTipIconSize(IFWL_Widget* pWidget) override;
+
     CFX_RectF GetAnchor();
     CFX_WideString m_wsCaption;
     int32_t m_nInitDelayTime;
     int32_t m_nAutoPopDelayTime;
     CFX_DIBitmap* m_pBitmap;
     CFX_SizeF m_fIconSize;
     CFX_RectF m_fAnchor;
   };
+
   CFWL_ToolTipDP m_tooltipData;
 };
 
 #endif  // XFA_FWL_LIGHTWIDGET_CFWL_TOOLTIP_H_