Make CFX_WideString(const CFX_WideString&) explicit.

xfa/fxfa/include/fxfa_widget.h

Index: xfa/fxfa/include/fxfa_widget.h
diff --git a/xfa/fxfa/include/fxfa_widget.h b/xfa/fxfa/include/fxfa_widget.h
index acd800dcd421bdfd921439f6001a2788989952a3..3745a38ec02b6fb72aaf1361ffe4dcbce038c432 100644
--- a/xfa/fxfa/include/fxfa_widget.h
+++ b/xfa/fxfa/include/fxfa_widget.h
@@ -35,13 +35,11 @@ class CXFA_WidgetAcc : public CXFA_WidgetData {
 
   FX_BOOL GetName(CFX_WideString& wsName, int32_t iNameType = 0);
   FX_BOOL ProcessValueChanged();
-
- public:
   void ResetData();
 
-  void SetImageEdit(const CFX_WideStringC& wsContentType,
-                    const CFX_WideStringC& wsHref,
-                    const CFX_WideStringC& wsData);
+  void SetImageEdit(const CFX_WideString& wsContentType,
+                    const CFX_WideString& wsHref,
+                    const CFX_WideString& wsData);
 
   CXFA_WidgetAcc* GetExclGroup();
   CXFA_FFDocView* GetDocView();