Cleanup forward declarations.

xfa/src/fxbarcode/qrcode/BC_QRDataBlock.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_QRCODE_BC_QRDATABLOCK_H_
 #define XFA_SRC_FXBARCODE_QRCODE_BC_QRDATABLOCK_H_
 
 #include "core/include/fxcrt/fx_basic.h"
 
 class CBC_QRCoderVersion;
-class CBC_QRCoderECBlocks;
-class CBC_QRCoderECB;
 class CBC_QRCoderErrorCorrectionLevel;
 class CBC_QRDataBlock {
  private:
   int32_t m_numDataCodewords;
   CFX_ByteArray* m_codewords;
   CBC_QRDataBlock(int32_t numDataCodewords, CFX_ByteArray* codewords);
 
  public:
   virtual ~CBC_QRDataBlock();
   int32_t GetNumDataCodewords();
   CFX_ByteArray* GetCodewords();
   static CFX_PtrArray* GetDataBlocks(CFX_ByteArray* rawCodewords,
                                      CBC_QRCoderVersion* version,
                                      CBC_QRCoderErrorCorrectionLevel* ecLevel,
                                      int32_t& e);
 };
 
 #endif  // XFA_SRC_FXBARCODE_QRCODE_BC_QRDATABLOCK_H_