Make code compile with clang_use_chrome_plugin (part VI)

xfa/fwl/lightwidget/cfwl_tooltip.h

Index: xfa/fwl/lightwidget/cfwl_tooltip.h
diff --git a/xfa/fwl/lightwidget/cfwl_tooltip.h b/xfa/fwl/lightwidget/cfwl_tooltip.h
index 74f702849c094d39d1f95c352fc417ba92006081..3cca28d94fb852127cbd8b905e72ad5c40e96fd4 100644
--- a/xfa/fwl/lightwidget/cfwl_tooltip.h
+++ b/xfa/fwl/lightwidget/cfwl_tooltip.h
@@ -12,10 +12,10 @@
 
 class CFWL_ToolTip : public CFWL_Widget {
  public:
-  static CFWL_ToolTip* Create();
-
   CFWL_ToolTip();
-  virtual ~CFWL_ToolTip();
+  ~CFWL_ToolTip() override;
+
+  static CFWL_ToolTip* Create();
 
   FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = nullptr);
 
@@ -41,11 +41,18 @@ class CFWL_ToolTip : public CFWL_Widget {
   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;
@@ -54,6 +61,7 @@ class CFWL_ToolTip : public CFWL_Widget {
     CFX_SizeF m_fIconSize;
     CFX_RectF m_fAnchor;
   };
+
   CFWL_ToolTipDP m_tooltipData;
 };