Remove FX_DWORD from core/ and delete definition

core/fpdfapi/fpdf_parser/include/cpdf_simple_parser.h

 // Copyright 2016 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 CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_SIMPLE_PARSER_H_
 #define CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_SIMPLE_PARSER_H_
 
 #include "core/fxcrt/include/fx_string.h"
 #include "core/fxcrt/include/fx_system.h"
 
 class CPDF_SimpleParser {
  public:
-  CPDF_SimpleParser(const uint8_t* pData, FX_DWORD dwSize);
+  CPDF_SimpleParser(const uint8_t* pData, uint32_t dwSize);
   CPDF_SimpleParser(const CFX_ByteStringC& str);
 
   CFX_ByteStringC GetWord();
 
   // Find the token and its |nParams| parameters from the start of data,
   // and move the current position to the start of those parameters.
   bool FindTagParamFromStart(const CFX_ByteStringC& token, int nParams);
 
   // For testing only.
-  FX_DWORD GetCurPos() const { return m_dwCurPos; }
+  uint32_t GetCurPos() const { return m_dwCurPos; }
 
  private:
-  void ParseWord(const uint8_t*& pStart, FX_DWORD& dwSize);
+  void ParseWord(const uint8_t*& pStart, uint32_t& dwSize);
 
   const uint8_t* m_pData;
-  FX_DWORD m_dwSize;
-  FX_DWORD m_dwCurPos;
+  uint32_t m_dwSize;
+  uint32_t m_dwCurPos;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_SIMPLE_PARSER_H_