Remove include only barcode.h and IWYU.

xfa/src/fxbarcode/qrcode/BC_QRGridSampler.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/barcode.h"
 #include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h"
 #include "xfa/src/fxbarcode/common/BC_CommonPerspectiveTransform.h"
 #include "xfa/src/fxbarcode/qrcode/BC_QRGridSampler.h"
+#include "xfa/src/fxbarcode/utils.h"
+
 CBC_QRGridSampler CBC_QRGridSampler::m_gridSampler;
+
 CBC_QRGridSampler::CBC_QRGridSampler() {}
 CBC_QRGridSampler::~CBC_QRGridSampler() {}
 CBC_QRGridSampler& CBC_QRGridSampler::GetInstance() {
   return m_gridSampler;
 }
 void CBC_QRGridSampler::CheckAndNudgePoints(CBC_CommonBitMatrix* image,
                                             CFX_FloatArray* points,
                                             int32_t& e) {
   int32_t width = image->GetWidth();
   int32_t height = image->GetHeight();
@@ skipping 88 matching lines @@
     CheckAndNudgePoints(image, &points, e);
     BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
     for (x = 0; x < max; x += 2) {
       if (image->Get((int32_t)points[x], (int32_t)points[x + 1])) {
         bits->Set(x >> 1, y);
       }
     }
   }
   return bits.release();
 }