Make down-conversion explicit from CFX_ByteString to CFX_ByteStringC.

fpdfsdk/fpdf_ext.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 "public/fpdf_ext.h"
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
@@ skipping 86 matching lines @@
 
 FX_BOOL CheckSharedForm(const CXML_Element* pElement, CFX_ByteString cbName) {
   int count = pElement->CountAttrs();
   int i = 0;
   for (i = 0; i < count; i++) {
     CFX_ByteString space, name;
     CFX_WideString value;
     pElement->GetAttrByIndex(i, space, name, value);
     if (space == "xmlns" && name == "adhocwf" &&
         value == L"http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/") {
-      CXML_Element* pVersion = pElement->GetElement("adhocwf", cbName);
+      CXML_Element* pVersion =
+          pElement->GetElement("adhocwf", cbName.AsByteStringC());
       if (!pVersion)
         continue;
-      CFX_WideString wsContent = pVersion->GetContent(0);  // == 1.1
+      CFX_WideString wsContent = pVersion->GetContent(0);
       int nType = wsContent.GetInteger();
       switch (nType) {
         case 1:
           FPDF_UnSupportError(FPDF_UNSP_DOC_SHAREDFORM_ACROBAT);
           break;
         case 2:
           FPDF_UnSupportError(FPDF_UNSP_DOC_SHAREDFORM_FILESYSTEM);
           break;
         case 0:
           FPDF_UnSupportError(FPDF_UNSP_DOC_SHAREDFORM_EMAIL);
@@ skipping 92 matching lines @@
     return PAGEMODE_USETHUMBS;
   if (strPageMode.EqualNoCase("FullScreen"))
     return PAGEMODE_FULLSCREEN;
   if (strPageMode.EqualNoCase("UseOC"))
     return PAGEMODE_USEOC;
   if (strPageMode.EqualNoCase("UseAttachments"))
     return PAGEMODE_USEATTACHMENTS;
 
   return PAGEMODE_UNKNOWN;
 }