Remove custom memory manager

core/src/fpdfapi/fpdf_page/fpdf_page_func.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/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "pageint.h"
 #include <limits.h>
@@ skipping 703 matching lines @@
     }
     CPDF_Array* pArray = pDict->GetArray(FX_BSTRC("Functions"));
     if (pArray == NULL) {
         return FALSE;
     }
     m_nSubs = pArray->GetCount();
     if (m_nSubs == 0) {
         return FALSE;
     }
     m_pSubFunctions = FX_Alloc(CPDF_Function*, m_nSubs);
-    FXSYS_memset32(m_pSubFunctions, 0, sizeof(CPDF_Function*)*m_nSubs);
     m_nOutputs = 0;
     int i;
     for (i = 0; i < m_nSubs; i ++) {
         CPDF_Object* pSub = pArray->GetElementValue(i);
         if (pSub == pObj) {
             return FALSE;
         }
         m_pSubFunctions[i] = CPDF_Function::Load(pSub);
         if (m_pSubFunctions[i] == NULL) {
             return FALSE;
@@ skipping 142 matching lines @@
         for (int i = 0; i < m_nOutputs; i ++) {
             if (results[i] < m_pRanges[i * 2]) {
                 results[i] = m_pRanges[i * 2];
             } else if (results[i] > m_pRanges[i * 2 + 1]) {
                 results[i] = m_pRanges[i * 2 + 1];
             }
         }
     }
     return TRUE;
 }