Remove typdefs for pointer types in fx_system.h

core/src/fxcrt/fx_basic_memmgr.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 <stdlib.h>  // For abort().
 #include "../../include/fxcrt/fx_memory.h"
 
 void*   FXMEM_DefaultAlloc(size_t byte_size, int flags)
@@ skipping 38 matching lines @@
         pTrunk = pNext;
     }
     m_pFirstTrunk = NULL;
 }
 void* CFX_GrowOnlyPool::Alloc(size_t size)
 {
     size = (size + 3) / 4 * 4;
     _FX_GrowOnlyTrunk* pTrunk = (_FX_GrowOnlyTrunk*)m_pFirstTrunk;
     while (pTrunk) {
         if (pTrunk->m_Size - pTrunk->m_Allocated >= size) {
-            void* p = (FX_LPBYTE)(pTrunk + 1) + pTrunk->m_Allocated;
+            void* p = (uint8_t*)(pTrunk + 1) + pTrunk->m_Allocated;
             pTrunk->m_Allocated += size;
             return p;
         }
         pTrunk = pTrunk->m_pNext;
     }
     size_t alloc_size = size > m_TrunkSize ? size : m_TrunkSize;
     pTrunk = (_FX_GrowOnlyTrunk*)FX_Alloc(uint8_t, sizeof(_FX_GrowOnlyTrunk) + alloc_size);
     pTrunk->m_Size = alloc_size;
     pTrunk->m_Allocated = size;
     pTrunk->m_pNext = (_FX_GrowOnlyTrunk*)m_pFirstTrunk;
     m_pFirstTrunk = pTrunk;
     return pTrunk + 1;
 }