Remove include only barcode.h and IWYU.

xfa/src/fxbarcode/common/BC_CommonECI.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/common/BC_CommonCharacterSetECI.h"
 #include "xfa/src/fxbarcode/common/BC_CommonECI.h"
+#include "xfa/src/fxbarcode/utils.h"
+
 CBC_CommonECI::CBC_CommonECI(int32_t value) {
   m_value = value;
 }
 CBC_CommonECI::~CBC_CommonECI() {}
 int32_t CBC_CommonECI::GetValue() {
   return m_value;
 }
 CBC_CommonECI* CBC_CommonECI::GetEICByValue(int32_t value, int32_t& e) {
   if (value < 0 || value > 999999) {
     e = BCExceptionBadECI;
     return NULL;
   }
   if (value < 900) {
   }
   return NULL;
 }