Remove include only barcode.h and IWYU.

xfa/src/fxbarcode/pdf417/BC_PDF417ECErrorCorrection.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 2012 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/pdf417/BC_PDF417Common.h"
 #include "xfa/src/fxbarcode/pdf417/BC_PDF417ECErrorCorrection.h"
 #include "xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusGF.h"
 #include "xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.h"
+#include "xfa/src/fxbarcode/utils.h"
+
 CBC_PDF417ECModulusGF* CBC_PDF417ECErrorCorrection::m_field = NULL;
+
 void CBC_PDF417ECErrorCorrection::Initialize(int32_t& e) {
   m_field =
       new CBC_PDF417ECModulusGF(CBC_PDF417Common::NUMBER_OF_CODEWORDS, 3, e);
 }
 void CBC_PDF417ECErrorCorrection::Finalize() {
   delete m_field;
 }
 CBC_PDF417ECErrorCorrection::CBC_PDF417ECErrorCorrection() {}
 CBC_PDF417ECErrorCorrection::~CBC_PDF417ECErrorCorrection() {}
 int32_t CBC_PDF417ECErrorCorrection::decode(CFX_Int32Array& received,
@@ skipping 339 matching lines @@
     int32_t denominator =
         m_field->inverse(formalDerivative.evaluateAt(xiInverse), e);
     if (e != BCExceptionNO) {
       delete result;
       return NULL;
     }
     result->SetAt(i, m_field->multiply(numerator, denominator));
   }
   return result;
 }