Make code compile with clang_use_chrome_plugin (part VI)

xfa/fwl/lightwidget/cfwl_scrollbar.h

Index: xfa/fwl/lightwidget/cfwl_scrollbar.h
diff --git a/xfa/fwl/lightwidget/cfwl_scrollbar.h b/xfa/fwl/lightwidget/cfwl_scrollbar.h
index fd80e8b8abcd53b70de0e07f19c28114e5f3a77e..b29691e003f9809cff149c842819034639a692d3 100644
--- a/xfa/fwl/lightwidget/cfwl_scrollbar.h
+++ b/xfa/fwl/lightwidget/cfwl_scrollbar.h
@@ -11,7 +11,11 @@
 
 class CFWL_ScrollBar : public CFWL_Widget {
  public:
+  CFWL_ScrollBar();
+  ~CFWL_ScrollBar() override;
+
   static CFWL_ScrollBar* Create();
+
   FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = NULL);
   FX_BOOL IsVertical();
   FWL_Error GetRange(FX_FLOAT& fMin, FX_FLOAT& fMax);
@@ -25,8 +29,6 @@ class CFWL_ScrollBar : public CFWL_Widget {
   FX_FLOAT GetTrackPos();
   FWL_Error SetTrackPos(FX_FLOAT fTrackPos);
   FX_BOOL DoScroll(uint32_t dwCode, FX_FLOAT fPos = 0.0f);
-  CFWL_ScrollBar();
-  virtual ~CFWL_ScrollBar();
 };
 
 #endif  // XFA_FWL_LIGHTWIDGET_CFWL_SCROLLBAR_H_