Use the system stdint.h on Windows.

Source/wtf/os-win32/stdint.h

-/*
- * Copyright (C) 2005, 2006 Apple Computer, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#ifndef STDINT_WIN32_H
-#define STDINT_WIN32_H
-
-/* This file emulates enough of stdint.h on Windows to make JavaScriptCore and WebCore
-   compile using MSVC which does not ship with the stdint.h header. */
-
-#if !COMPILER(MSVC)
-#error "This stdint.h file should only be compiled with MSVC"
-#endif
-
-#include <limits.h>
-
-typedef unsigned char uint8_t;
-typedef signed char int8_t;
-typedef unsigned short uint16_t;
-typedef short int16_t;
-typedef unsigned int uint32_t;
-typedef int int32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-
-#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS)
-#ifndef SIZE_MAX
-#ifdef _WIN64
-#define SIZE_MAX  _UI64_MAX
-#else
-#define SIZE_MAX  _UI32_MAX
-#endif
-#endif
-#endif
-
-#ifndef CASSERT
-#define CASSERT(exp, name) typedef int dummy##name [(exp) ? 1 : -1];
-#endif
-
-CASSERT(sizeof(int8_t) == 1, int8_t_is_one_byte)
-CASSERT(sizeof(uint8_t) == 1, uint8_t_is_one_byte)
-CASSERT(sizeof(int16_t) == 2, int16_t_is_two_bytes)
-CASSERT(sizeof(uint16_t) == 2, uint16_t_is_two_bytes)
-CASSERT(sizeof(int32_t) == 4, int32_t_is_four_bytes)
-CASSERT(sizeof(uint32_t) == 4, uint32_t_is_four_bytes)
-CASSERT(sizeof(int64_t) == 8, int64_t_is_eight_bytes)
-CASSERT(sizeof(uint64_t) == 8, uint64_t_is_eight_bytes)
-
-#endif