Make CFX_WideString(const CFX_WideString&) explicit.

xfa/fxfa/parser/xfa_script_layoutpseudomodel.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_layoutpseudomodel.h"
 
 #include "xfa/fxfa/app/xfa_ffnotify.h"
 #include "xfa/fxfa/fm2js/xfa_fm2jsapi.h"
@@ skipping 47 matching lines @@
         methodName = L"x";
         break;
       case XFA_LAYOUTMODEL_Y:
         methodName = L"y";
         break;
     }
     ThrowScriptErrorMessage(XFA_IDS_INCORRECT_NUMBER_OF_METHOD, methodName);
     return;
   }
   CXFA_Node* pNode = NULL;
-  CFX_WideString wsUnit = FX_WSTRC(L"pt");
+  CFX_WideString wsUnit(L"pt");
   int32_t iIndex = 0;
   if (iLength >= 1) {
     pNode = static_cast<CXFA_Node*>(pArguments->GetObject(0));
   }
   if (iLength >= 2) {
     CFX_ByteString bsUnit = pArguments->GetUTF8String(1);
     if (!bsUnit.IsEmpty()) {
       wsUnit = CFX_WideString::FromUTF8(bsUnit.AsStringC());
     }
   }
@@ skipping 469 matching lines @@
   CXFA_LayoutItem* pLayoutItem = pDocLayout->GetLayoutItem(pNode);
   if (!pLayoutItem) {
     FXJSE_Value_SetInteger(hValue, -1);
     return;
   }
   iPage = pLayoutItem->GetFirst()->GetPage()->GetPageIndex();
   if (hValue) {
     FXJSE_Value_SetInteger(hValue, bAbsPage ? iPage : iPage + 1);
   }
 }