Remove kuint64max.

base/basictypes.h

 // Copyright 2013 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_BASICTYPES_H_
 #define BASE_BASICTYPES_H_
 
 #include <limits.h>  // So we can set the bounds of our types.
 #include <stddef.h>  // For size_t.
 #include <stdint.h>  // For intptr_t.
 
 #include "base/macros.h"
 #include "build/build_config.h"
 
 // DEPRECATED: Use (u)int{8,16,32,64}_t instead (and include <stdint.h>).
 // http://crbug.com/138542
 typedef int8_t int8;
 typedef uint8_t uint8;
 typedef int16_t int16;
 typedef uint16_t uint16;
 typedef int32_t int32;
 typedef uint32_t uint32;
 typedef int64_t int64;
 typedef uint64_t uint64;
 
 // DEPRECATED: Use std::numeric_limits (from <limits>) or
 // (U)INT{8,16,32,64}_{MIN,MAX} in case of globals (and include <stdint.h>).
 // http://crbug.com/138542
-const uint64 kuint64max =  0xFFFFFFFFFFFFFFFFULL;
 const  int32 kint32max  =  0x7FFFFFFF;
 
 #endif  // BASE_BASICTYPES_H_