Make down-conversion explicit from CFX_Widetring to CFX_WideStringC.

xfa/fxfa/app/xfa_ffwidget.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/include/fxfa/xfa_ffwidget.h"
 
 #include <algorithm>
 
@@ skipping 960 matching lines @@
                                 int32_t& iImageYDpi) {
   CFX_WideString wsHref;
   pImage->GetHref(wsHref);
   CFX_WideString wsImage;
   pImage->GetContent(wsImage);
   if (wsHref.IsEmpty() && wsImage.IsEmpty()) {
     return NULL;
   }
   CFX_WideString wsContentType;
   pImage->GetContentType(wsContentType);
-  FXCODEC_IMAGE_TYPE type = XFA_GetImageType(wsContentType);
+  FXCODEC_IMAGE_TYPE type = XFA_GetImageType(wsContentType.AsWideStringC());
   CFX_ByteString bsContent;
   uint8_t* pImageBuffer = NULL;
   IFX_FileRead* pImageFileRead = NULL;
   if (wsImage.GetLength() > 0) {
     XFA_ATTRIBUTEENUM iEncoding =
         (XFA_ATTRIBUTEENUM)pImage->GetTransferEncoding();
     if (iEncoding == XFA_ATTRIBUTEENUM_Base64) {
       CFX_ByteString bsData = wsImage.UTF8Encode();
       int32_t iLength = bsData.GetLength();
       pImageBuffer = FX_Alloc(uint8_t, iLength);
       int32_t iRead = XFA_Base64Decode((const FX_CHAR*)bsData, pImageBuffer);
       if (iRead > 0) {
         pImageFileRead = FX_CreateMemoryStream(pImageBuffer, iRead);
       }
     } else {
       bsContent = CFX_ByteString::FromUnicode(wsImage);
       pImageFileRead = FX_CreateMemoryStream(
           (uint8_t*)(const uint8_t*)bsContent, bsContent.GetLength());
     }
   } else {
     CFX_WideString wsURL = wsHref;
     if (wsURL.Left(7) != FX_WSTRC(L"http://") &&
         wsURL.Left(6) != FX_WSTRC(L"ftp://")) {
       CFX_DIBitmap* pBitmap =
-          pDoc->GetPDFNamedImage(wsURL, iImageXDpi, iImageYDpi);
+          pDoc->GetPDFNamedImage(wsURL.AsWideStringC(), iImageXDpi, iImageYDpi);
       if (pBitmap) {
         bNameImage = TRUE;
         return pBitmap;
       }
     }
     pImageFileRead = pDoc->GetDocProvider()->OpenLinkedFile(pDoc, wsURL);
   }
   if (!pImageFileRead) {
     FX_Free(pImageBuffer);
     return NULL;
@@ skipping 939 matching lines @@
       iType != XFA_ELEMENT_Rectangle) {
     return;
   }
   CXFA_StrokeArray strokes;
   if (!(dwFlags & XFA_DRAWBOX_ForceRound) && iType != XFA_ELEMENT_Arc) {
     box.GetStrokes(strokes);
   }
   XFA_BOX_Fill(box, strokes, pGS, rtWidget, pMatrix, dwFlags);
   XFA_BOX_Stroke(box, strokes, pGS, rtWidget, pMatrix, dwFlags);
 }