Remove include only barcode.h and IWYU.

xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.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_PDF417ECModulusGF.h"
 #include "xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.h"
+#include "xfa/src/fxbarcode/utils.h"
+
 CBC_PDF417ECModulusPoly::CBC_PDF417ECModulusPoly(CBC_PDF417ECModulusGF* field,
                                                  CFX_Int32Array& coefficients,
                                                  int32_t& e) {
   if (coefficients.GetSize() == 0) {
     e = BCExceptionIllegalArgument;
   }
   m_field = field;
   int32_t coefficientsLength = coefficients.GetSize();
   if (coefficientsLength > 1 && coefficients[0] == 0) {
     int32_t firstNonZero = 1;
@@ skipping 285 matching lines @@
           result += 'x';
         } else {
           result += "x^";
           result += degree;
         }
       }
     }
   }
   return result;
 }