Cleanup forward declarations.

xfa/src/fxbarcode/qrcode/BC_QRCodeReader.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_QRCODEREADER_H_
 #define XFA_SRC_FXBARCODE_QRCODE_BC_QRCODEREADER_H_
 
 #include <stdint.h>
 
 #include "core/include/fxcrt/fx_string.h"
 #include "xfa/src/fxbarcode/BC_Reader.h"
 
-class CBC_QRDetector;
 class CBC_BinaryBitmap;
 class CBC_QRCoderDecoder;
-class CBC_ResultPoint;
-class CBC_ReedSolomonGF256;
-class CBC_QRCoderVersion;
-class CBC_QRDetector;
-class CBC_QRDetectorResult;
-class CBC_QRCoderErrorCorrectionLevel;
-class CBC_QRCoderMode;
-class CBC_QRDataMask;
 class CFX_DIBitmap;
 
 class CBC_QRCodeReader : public CBC_Reader {
  private:
   CBC_QRCoderDecoder* m_decoder;
 
  public:
   CBC_QRCodeReader();
   virtual ~CBC_QRCodeReader();
   CFX_ByteString Decode(CFX_DIBitmap* pBitmap,
                         int32_t hints,
                         int32_t byteModeDecode,
                         int32_t& e);
   CFX_ByteString Decode(const CFX_WideString& filename,
                         int32_t hints,
                         int32_t byteModeDecode,
                         int32_t& e);
   static void ReleaseAll();
   CFX_ByteString Decode(CBC_BinaryBitmap* image, int32_t hints, int32_t& e);
   CFX_ByteString Decode(CBC_BinaryBitmap* image, int32_t& e);
   virtual void Init();
 };
 
 #endif  // XFA_SRC_FXBARCODE_QRCODE_BC_QRCODEREADER_H_