Make CFX_ByteString(const CFX_ByteStringC&) explicit.

core/fpdfapi/fpdf_parser/cpdf_document.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 "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 
 #include <set>
 
@@ skipping 821 matching lines @@
     return;
 
   m_PageList.RemoveAt(iPage);
 }
 
 CPDF_Font* CPDF_Document::AddStandardFont(const FX_CHAR* font,
                                           CPDF_FontEncoding* pEncoding) {
   CFX_ByteString name(font);
   if (PDF_GetStandardFontName(&name) < 0)
     return nullptr;
-  return GetPageData()->GetStandardFont(name.AsStringC(), pEncoding);
+  return GetPageData()->GetStandardFont(name, pEncoding);
 }
 
 CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
   if (!pFont)
     return nullptr;
 
   bool bCJK = charset == FXFONT_CHINESEBIG5_CHARSET ||
               charset == FXFONT_GB2312_CHARSET ||
               charset == FXFONT_HANGEUL_CHARSET ||
               charset == FXFONT_SHIFTJIS_CHARSET;
@@ skipping 586 matching lines @@
     }
   }
   pFontDesc->SetAtInteger("StemV", fStemV);
   AddIndirectObject(pFontDesc);
   pFontDict->SetAtReference("FontDescriptor", this, pFontDesc);
   CFRelease(traits);
   CFRelease(languages);
   return LoadFont(pBaseDict);
 }
 #endif  // _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_