Remove include only barcode.h and IWYU.

xfa/src/fxbarcode/datamatrix/BC_DataMatrixReader.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
 // Original code is licensed as follows:
 /*
  * Copyright 2007 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #include "xfa/src/fxbarcode/BC_BinaryBitmap.h"
 #include "xfa/src/fxbarcode/BC_Reader.h"
-#include "xfa/src/fxbarcode/barcode.h"
 #include "xfa/src/fxbarcode/common/BC_CommonDecoderResult.h"
 #include "xfa/src/fxbarcode/datamatrix/BC_DataMatrixDecoder.h"
 #include "xfa/src/fxbarcode/datamatrix/BC_DataMatrixDetector.h"
 #include "xfa/src/fxbarcode/datamatrix/BC_DataMatrixReader.h"
 #include "xfa/src/fxbarcode/qrcode/BC_QRDetectorResult.h"
+#include "xfa/src/fxbarcode/utils.h"
+
 CBC_DataMatrixReader::CBC_DataMatrixReader() {
   m_decoder = NULL;
 }
 void CBC_DataMatrixReader::Init() {
   m_decoder = new CBC_DataMatrixDecoder;
   m_decoder->Init();
 }
 CBC_DataMatrixReader::~CBC_DataMatrixReader() {
   if (m_decoder != NULL) {
     delete m_decoder;
@@ skipping 16 matching lines @@
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   CBC_AutoPtr<CBC_CommonDecoderResult> decodeResult(ResultTemp);
   return decodeResult->GetText();
 }
 CFX_ByteString CBC_DataMatrixReader::Decode(CBC_BinaryBitmap* image,
                                             int32_t& e) {
   CFX_ByteString bs = Decode(image, 0, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   return bs;
 }