XFA: Actually fix all relative includes to third_party.

xfa/src/fxbarcode/datamatrix/BC_DataMatrixWriter.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_DATAMATRIXWRITER_H_
-#define _BC_DATAMATRIXWRITER_H_
+#ifndef XFA_SRC_FXBARCODE_DATAMATRIX_BC_DATAMATRIXWRITER_H_
+#define XFA_SRC_FXBARCODE_DATAMATRIX_BC_DATAMATRIXWRITER_H_
+
+#include "xfa/src/fxbarcode/BC_TwoDimWriter.h"
+
 class CBC_CommonByteMatrix;
-class CBC_CommonBitMatrix;
 class CBC_DefaultPlacement;
-class CBC_SymbolShapeHint;
 class CBC_SymbolInfo;
-class CBC_TwoDimWriter;
-class CBC_DataMatrixWriter;
+
 class CBC_DataMatrixWriter : public CBC_TwoDimWriter {
  public:
   CBC_DataMatrixWriter();
   virtual ~CBC_DataMatrixWriter();
   uint8_t* Encode(const CFX_WideString& contents,
                   int32_t& outWidth,
                   int32_t& outHeight,
                   int32_t& e);
   uint8_t* Encode(const CFX_ByteString& contents,
                   BCFORMAT format,
                   int32_t& outWidth,
                   int32_t& outHeight,
                   int32_t& e);
   uint8_t* Encode(const CFX_ByteString& contents,
                   BCFORMAT format,
                   int32_t& outWidth,
                   int32_t& outHeight,
                   int32_t hints,
                   int32_t& e);
   FX_BOOL SetErrorCorrectionLevel(int32_t level);
 
  private:
   static CBC_CommonByteMatrix* encodeLowLevel(CBC_DefaultPlacement* placement,
                                               CBC_SymbolInfo* symbolInfo,
                                               int32_t& e);
   int32_t m_iCorrectLevel;
 };
-#endif
+
+#endif  // XFA_SRC_FXBARCODE_DATAMATRIX_BC_DATAMATRIXWRITER_H_