Make code compile with clang_use_chrome_plugin (part III)

xfa/fxbarcode/cbc_ean13.cpp

 // Copyright 2016 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
 /*
  * Copyright 2011 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ skipping 74 matching lines @@
   return TRUE;
 }
 
 FX_BOOL CBC_EAN13::RenderBitmap(CFX_DIBitmap*& pOutBitmap, int32_t& e) {
   static_cast<CBC_OneDimWriter*>(m_pBCWriter.get())
       ->RenderBitmapResult(pOutBitmap, m_renderContents.AsStringC(), e);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
   return TRUE;
 }
 
+BC_TYPE CBC_EAN13::GetType() {
+  return BC_EAN13;
+}
+
 CFX_WideString CBC_EAN13::Decode(uint8_t* buf,
                                  int32_t width,
                                  int32_t height,
                                  int32_t& e) {
   CFX_WideString str;
   return str;
 }
 
 CFX_WideString CBC_EAN13::Decode(CFX_DIBitmap* pBitmap, int32_t& e) {
   CBC_BufferedImageLuminanceSource source(pBitmap);
   CBC_GlobalHistogramBinarizer binarizer(&source);
   CBC_BinaryBitmap bitmap(&binarizer);
   CFX_ByteString str = m_pBCReader->Decode(&bitmap, 0, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, CFX_WideString());
   return CFX_WideString::FromUTF8(str.AsStringC());
 }