Make down-conversion explicit from CFX_Widetring to CFX_WideStringC.

xfa/fxfa/parser/xfa_layout_itemlayout.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_itemlayout.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 1370 matching lines @@
   if (pLayoutNode->TryCData(XFA_ATTRIBUTE_ColumnWidths, wsColumnWidths)) {
     CFX_WideStringArray widths;
     if (FX_SeparateStringW(wsColumnWidths.raw_str(), wsColumnWidths.GetLength(),
                            L' ', widths) > 0) {
       int32_t iCols = widths.GetSize();
       CFX_WideString wsWidth;
       for (int32_t i = 0; i < iCols; i++) {
         wsWidth = widths[i];
         wsWidth.TrimLeft(L' ');
         if (!wsWidth.IsEmpty()) {
-          CXFA_Measurement measure(wsWidth);
+          CXFA_Measurement measure(wsWidth.AsWideStringC());
           m_rgSpecifiedColumnWidths.Add(measure.ToUnit(XFA_UNIT_Pt));
         }
       }
     }
   }
   int32_t iSpecifiedColumnCount = m_rgSpecifiedColumnWidths.GetSize();
   CXFA_LayoutContext layoutContext;
   layoutContext.m_prgSpecifiedColumnWidths = &m_rgSpecifiedColumnWidths;
   CXFA_LayoutContext* pLayoutContext =
       iSpecifiedColumnCount > 0 ? &layoutContext : NULL;
@@ skipping 1561 matching lines @@
         (int32_t)(uintptr_t)m_PendingNodesCount.GetValueAt(pTemplate);
     if (iCount >= iMax) {
       return FALSE;
     }
     iCount++;
     m_PendingNodesCount.SetAt(pTemplate, (void*)(uintptr_t)(iCount));
     return TRUE;
   }
   return TRUE;
 }