Remove FX_DWORD from core/ and delete definition

core/fxcodec/codec/fx_codec_png.cpp

 // 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
 
 #include <algorithm>
 
 #include "core/fxcodec/codec/codec_int.h"
 #include "core/include/fxcodec/fx_codec.h"
@@ skipping 221 matching lines @@
 }
 void CCodec_PngModule::Finish(void* pContext) {
   FXPNG_Context* p = (FXPNG_Context*)pContext;
   if (p) {
     png_destroy_read_struct(&(p->png_ptr), &(p->info_ptr), (png_infopp)NULL);
     p->m_FreeFunc(p);
   }
 }
 FX_BOOL CCodec_PngModule::Input(void* pContext,
                                 const uint8_t* src_buf,
-                                FX_DWORD src_size,
+                                uint32_t src_size,
                                 CFX_DIBAttribute* pAttribute) {
   FXPNG_Context* p = (FXPNG_Context*)pContext;
   if (setjmp(png_jmpbuf(p->png_ptr))) {
     if (pAttribute &&
         0 == FXSYS_strcmp(m_szLastError, "Read Header Callback Error")) {
       _png_load_bmp_attribute(p->png_ptr, p->info_ptr, pAttribute);
     }
     return FALSE;
   }
   png_process_data(p->png_ptr, p->info_ptr, (uint8_t*)src_buf, src_size);
   return TRUE;
 }