Remove custom memory manager

core/src/fxcodec/codec/fx_codec_flate.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 "../../fx_zlib.h"
 #include "../../../include/fxcodec/fx_codec.h"
 #include "codec_int.h"
 extern "C"
@@ skipping 636 matching lines @@
                 Columns = m_OrigWidth;
             }
             m_Colors = Colors;
             m_BitsPerComponent = BitsPerComponent;
             m_Columns = Columns;
             m_PredictPitch = (m_BitsPerComponent * m_Colors * m_Columns + 7) / 8;
             m_pLastLine = FX_Alloc(FX_BYTE, m_PredictPitch);
             if (m_pLastLine == NULL) {
                 return FALSE;
             }
-            FXSYS_memset32(m_pLastLine, 0, m_PredictPitch);
             m_pPredictRaw = FX_Alloc(FX_BYTE, m_PredictPitch + 1);
             if (m_pPredictRaw == NULL) {
                 return FALSE;
             }
             m_pPredictBuffer = FX_Alloc(FX_BYTE, m_PredictPitch);
             if (m_pPredictBuffer == NULL) {
                 return FALSE;
             }
         }
     }
@@ skipping 268 matching lines @@
     dest_size = src_size + src_size / 1000 + 12;
     dest_buf = FX_Alloc( FX_BYTE, dest_size);
     if (dest_buf == NULL) {
         return FALSE;
     }
     unsigned long temp_size = dest_size;
     FPDFAPI_FlateCompress(dest_buf, &temp_size, src_buf, src_size);
     dest_size = (FX_DWORD)temp_size;
     return TRUE;
 }