Remove custom memory manager

core/src/fxcodec/codec/fx_codec_jpeg.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 "../../../include/fxcodec/fx_codec.h"
 #include "../../../include/fxge/fx_dib.h"
 #include "codec_int.h"
 extern "C" {
@@ skipping 178 matching lines @@
     int nComponents = Bpp >= 3 ? (pSource->IsCmykImage() ? 4 : 3) : 1;
     int pitch = pSource->GetPitch();
     int width = pSource->GetWidth();
     int height = pSource->GetHeight();
     FX_DWORD dest_buf_length = width * height * nComponents + 1024 + (icc_length ? (icc_length + 255 * 18) : 0);
     dest_buf = FX_Alloc(FX_BYTE, dest_buf_length);
     while (dest_buf == NULL) {
         dest_buf_length >>= 1;
         dest_buf = FX_Alloc(FX_BYTE, dest_buf_length);
     }
-    FXSYS_memset32(dest_buf, 0, dest_buf_length);
     struct jpeg_destination_mgr dest;
     dest.init_destination = _dest_do_nothing;
     dest.term_destination = _dest_do_nothing;
     dest.empty_output_buffer = _dest_empty;
     dest.next_output_byte = dest_buf;
     dest.free_in_buffer = dest_buf_length;
     cinfo.dest = &dest;
     cinfo.image_width = width;
     cinfo.image_height = height;
     cinfo.input_components = nComponents;
@@ skipping 517 matching lines @@
         return m_pExtProvider->GetAvailInput(pContext, avail_buf_ptr);
     }
     if(avail_buf_ptr != NULL) {
         *avail_buf_ptr = NULL;
         if(((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) {
             *avail_buf_ptr = (FX_LPBYTE)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte;
         }
     }
     return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer;
 }