Remove unused GG_(U)INTn_C macros from base/port.h.

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)
+// DEPRECATED: In Chromium, we force-define __STDC_CONSTANT_MACROS, so you can
+// just use the regular (U)INTn_C macros from <stdint.h>.
+// TODO(viettrungluu): Remove the remaining GG_(U)INTn_C macros.
 #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)
 
 // 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.
 #if defined(COMPILER_GCC)
 #define GG_VA_COPY(a, b) (va_copy(a, b))
 #elif defined(COMPILER_MSVC)
 #define GG_VA_COPY(a, b) (a = b)
 #endif
 
 // Define an OS-neutral wrapper for shared library entry points
 #if defined(OS_WIN)
 #define API_CALL __stdcall
 #else
 #define API_CALL
 #endif
 
 #endif  // BASE_PORT_H_