Make CFX_WideString(const CFX_WideString&) explicit.

xfa/fxfa/parser/xfa_script_nodehelper.cpp

 // 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
 
 #include "xfa/fxfa/parser/xfa_script_nodehelper.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 #include "xfa/fxfa/fm2js/xfa_fm2jsapi.h"
@@ skipping 290 matching lines @@
   if ((refNode->IsUnnamed() && refNode->IsContainerNode()) ||
       eRefNode == XFA_ELEMENT_SubformSet || eRefNode == XFA_ELEMENT_Area ||
       eRefNode == XFA_ELEMENT_Proto) {
     return TRUE;
   }
   return FALSE;
 }
 FX_BOOL CXFA_NodeHelper::XFA_CreateNode_ForCondition(
     CFX_WideString& wsCondition) {
   int32_t iLen = wsCondition.GetLength();
-  CFX_WideString wsIndex = FX_WSTRC(L"0");
+  CFX_WideString wsIndex(L"0");
   FX_BOOL bAll = FALSE;
-
   if (iLen == 0) {
     m_iCreateFlag = XFA_RESOLVENODE_RSTYPE_CreateNodeOne;
     return FALSE;
   }
   if (wsCondition.GetAt(0) == '[') {
     int32_t i = 1;
     for (; i < iLen; ++i) {
       FX_WCHAR ch = wsCondition[i];
       if (ch == ' ') {
         continue;
@@ skipping 95 matching lines @@
     m_eLastCreateType = XFA_ELEMENT_DataValue;
   }
 }
 FX_BOOL CXFA_NodeHelper::XFA_NodeIsProperty(CXFA_Node* refNode) {
   CXFA_Node* parent =
       XFA_ResolveNodes_GetParent(refNode, XFA_LOGIC_NoTransparent);
   return parent && refNode &&
          XFA_GetPropertyOfElement(parent->GetClassID(), refNode->GetClassID(),
                                   XFA_XDPPACKET_UNKNOWN);
 }