Remove include only barcode.h and IWYU.

xfa/src/fxbarcode/datamatrix/BC_DataMatrixDataBlock.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 2008 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/barcode.h"
 #include "xfa/src/fxbarcode/datamatrix/BC_DataMatrixDataBlock.h"
 #include "xfa/src/fxbarcode/datamatrix/BC_DataMatrixVersion.h"
+#include "xfa/src/fxbarcode/utils.h"
+
 CBC_DataMatrixDataBlock::~CBC_DataMatrixDataBlock() {}
 CBC_DataMatrixDataBlock::CBC_DataMatrixDataBlock(int32_t numDataCodewords,
                                                  CFX_ByteArray* codewords) {
   m_codewords.Copy(*codewords);
   m_numDataCodewords = numDataCodewords;
 }
 CFX_PtrArray* CBC_DataMatrixDataBlock::GetDataBlocks(
     CFX_ByteArray* rawCodewords,
     CBC_DataMatrixVersion* version,
     int32_t& e) {
@@ skipping 66 matching lines @@
     return NULL;
   }
   return result.release();
 }
 int32_t CBC_DataMatrixDataBlock::GetNumDataCodewords() {
   return m_numDataCodewords;
 }
 CFX_ByteArray* CBC_DataMatrixDataBlock::GetCodewords() {
   return &m_codewords;
 }