Make down-conversion explicit from CFX_Widetring to CFX_WideStringC.

xfa/fxfa/parser/xfa_layout_pagemgr_new.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_layout_pagemgr_new.h"
 
 #include "xfa/fxfa/app/xfa_ffnotify.h"
 #include "xfa/fxfa/fm2js/xfa_fm2jsapi.h"
@@ skipping 279 matching lines @@
     } else {
       wsTargetExpr = wsTargetAll;
     }
     if (wsTargetExpr.IsEmpty()) {
       return NULL;
     }
     bTargetAllFind = FALSE;
     if (wsTargetExpr.GetAt(0) == '#') {
       CXFA_Node* pNode = pDocument->GetNodeByID(
           ToNode(pDocument->GetXFAObject(XFA_HASHCODE_Template)),
-          wsTargetExpr.Mid(1));
+          wsTargetExpr.Mid(1).AsWideStringC());
       if (pNode) {
         return pNode;
       }
     } else if (bNewExprStyle) {
       CFX_WideString wsProcessedTarget = wsTargetExpr;
       if (wsTargetExpr.Left(4) == FX_WSTRC(L"som(") &&
           wsTargetExpr.Right(1) == FX_WSTRC(L")")) {
         wsProcessedTarget = wsTargetExpr.Mid(4, wsTargetExpr.GetLength() - 5);
       }
       XFA_RESOLVENODE_RS rs;
       int32_t iCount = pDocument->GetScriptContext()->ResolveObjects(
-          pPageSetRoot, wsProcessedTarget, rs,
+          pPageSetRoot, wsProcessedTarget.AsWideStringC(), rs,
           XFA_RESOLVENODE_Children | XFA_RESOLVENODE_Properties |
               XFA_RESOLVENODE_Attributes | XFA_RESOLVENODE_Siblings |
               XFA_RESOLVENODE_Parent);
       if (iCount > 0 && rs.nodes[0]->IsNode()) {
         return rs.nodes[0]->AsNode();
       }
     }
     iSpliteIndex = iSpliteNextIndex;
   }
   return NULL;
@@ skipping 1602 matching lines @@
   }
   pRootLayoutItem = m_pPageSetLayoutItemRoot;
   CXFA_ContainerLayoutItem* pNextLayout = NULL;
   for (; pRootLayoutItem; pRootLayoutItem = pNextLayout) {
     pNextLayout = (CXFA_ContainerLayoutItem*)pRootLayoutItem->m_pNextSibling;
     SaveLayoutItem(pRootLayoutItem);
     delete pRootLayoutItem;
   }
   m_pPageSetLayoutItemRoot = NULL;
 }