Keep only base/extractor.[cc|h].

third_party/chrome/base/port.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_PORT_H_
-#define BASE_PORT_H_
-
-#include <stdarg.h>
-#include "build/build_config.h"
-
-#ifdef COMPILER_MSVC
-#define GG_LONGLONG(x) x##I64
-#define GG_ULONGLONG(x) x##UI64
-#else
-#define GG_LONGLONG(x) x##LL
-#define GG_ULONGLONG(x) x##ULL
-#endif
-
-// Per C99 7.8.14, define __STDC_CONSTANT_MACROS before including <stdint.h>
-// to get the INTn_C and UINTn_C macros for integer constants.  It's difficult
-// to guarantee any specific ordering of header includes, so it's difficult to
-// guarantee that the INTn_C macros can be defined by including <stdint.h> at
-// any specific point.  Provide GG_INTn_C macros instead.
-
-#define GG_INT8_C(x)    (x)
-#define GG_INT16_C(x)   (x)
-#define GG_INT32_C(x)   (x)
-#define GG_INT64_C(x)   GG_LONGLONG(x)
-
-#define GG_UINT8_C(x)   (x ## U)
-#define GG_UINT16_C(x)  (x ## U)
-#define GG_UINT32_C(x)  (x ## U)
-#define GG_UINT64_C(x)  GG_ULONGLONG(x)
-
-namespace base {
-
-// It's possible for functions that use a va_list, such as StringPrintf, to
-// invalidate the data in it upon use.  The fix is to make a copy of the
-// structure before using it and use that copy instead.  va_copy is provided
-// for this purpose.  MSVC does not provide va_copy, so define an
-// implementation here.  It is not guaranteed that assignment is a copy, so the
-// StringUtil.VariableArgsFunc unit test tests this capability.
-inline void va_copy(va_list& a, va_list& b) {
-#if defined(COMPILER_GCC)
-  ::va_copy(a, b);
-#elif defined(COMPILER_MSVC)
-  a = b;
-#endif
-}
-
-}  // namespace base
-
-// Define an OS-neutral wrapper for shared library entry points
-#if defined(OS_WIN)
-#define API_CALL __stdcall
-#elif defined(OS_LINUX) || defined(OS_MACOSX)
-#define API_CALL
-#endif
-
-#endif  // BASE_PORT_H_