Fixup incorrect include guards.

xfa/src/fxbarcode/qrcode/BC_QRCoderDecoder.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 _BC_QRCODERDECODER_H_
-#define _BC_QRCODERDECODER_H_
+#ifndef XFA_SRC_FXBARCODE_QRCODE_BC_QRCODERDECODER_H_
+#define XFA_SRC_FXBARCODE_QRCODE_BC_QRCODERDECODER_H_
+
 class CBC_CommonBitMatrix;
 class CBC_ReedSolomonDecoder;
 class CBC_CommonDecoderResult;
 class CBC_QRBitMatrixParser;
 class CBC_QRCoderVersion;
 class CBC_QRDataBlock;
 class CBC_QRCoderDecoder {
  private:
   CBC_ReedSolomonDecoder* m_rsDecoder;
 
  public:
   CBC_QRCoderDecoder();
   virtual ~CBC_QRCoderDecoder();
 
   CBC_CommonDecoderResult* Decode(FX_BOOL* image,
                                   int32_t width,
                                   int32_t height,
                                   int32_t& e);
   CBC_CommonDecoderResult* Decode(CBC_CommonBitMatrix* bits,
                                   int32_t byteModeDecode,
                                   int32_t& e);
   void CorrectErrors(CFX_ByteArray* codewordBytes,
                      int32_t numDataCodewords,
                      int32_t& e);
   virtual void Init();
 };
-#endif
+
+#endif  // XFA_SRC_FXBARCODE_QRCODE_BC_QRCODERDECODER_H_