Remove include only barcode.h and IWYU.

xfa/src/fxbarcode/datamatrix/BC_DataMatrixVersion.h

 // 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
 
 #ifndef XFA_SRC_FXBARCODE_DATAMATRIX_BC_DATAMATRIXVERSION_H_
 #define XFA_SRC_FXBARCODE_DATAMATRIX_BC_DATAMATRIXVERSION_H_
 
-class ECBlocks;
+#include "core/include/fxcrt/fx_basic.h"
+
 class CBC_DataMatrixVersion;
+
 class ECB {
  public:
   ECB(int32_t count, int32_t dataCodewords) {
     m_count = count;
     m_dataCodewords = dataCodewords;
   }
 
   int32_t GetCount() { return m_count; }
 
   int32_t GetDataCodewords() { return m_dataCodewords; }
 
  private:
   int32_t m_count;
   int32_t m_dataCodewords;
 };
+
 class ECBlocks {
  public:
   ECBlocks(int32_t ecCodewords, ECB* ecBlocks) {
     m_ecCodewords = ecCodewords;
     m_ecBlocks.Add(ecBlocks);
   }
 
   ECBlocks(int32_t ecCodewords, ECB* ecBlocks1, ECB* ecBlocks2) {
     m_ecCodewords = ecCodewords;
     m_ecBlocks.Add(ecBlocks1);
     m_ecBlocks.Add(ecBlocks2);
   }
   ~ECBlocks() {
     for (int32_t i = 0; i < m_ecBlocks.GetSize(); i++) {
       delete (ECB*)m_ecBlocks[i];
     }
     m_ecBlocks.RemoveAll();
   }
 
   int32_t GetECCodewords() { return m_ecCodewords; }
 
   const CFX_PtrArray& GetECBlocks() { return m_ecBlocks; }
 
  private:
   int32_t m_ecCodewords;
   CFX_PtrArray m_ecBlocks;
 };
+
 class CBC_DataMatrixVersion {
  public:
   CBC_DataMatrixVersion(int32_t versionNumber,
                         int32_t symbolSizeRows,
                         int32_t symbolSizeColumns,
                         int32_t dataRegionSizeRows,
                         int32_t dataRegionSizeColumns,
                         ECBlocks* ecBlocks);
   virtual ~CBC_DataMatrixVersion();
   static void Initialize();
@@ skipping 15 matching lines @@
   int32_t m_symbolSizeRows;
   int32_t m_symbolSizeColumns;
   int32_t m_dataRegionSizeRows;
   int32_t m_dataRegionSizeColumns;
   ECBlocks* m_ecBlocks;
   int32_t m_totalCodewords;
   static CFX_PtrArray* VERSIONS;
 };
 
 #endif  // XFA_SRC_FXBARCODE_DATAMATRIX_BC_DATAMATRIXVERSION_H_