Switch to standard integer types in base/.

base/sys_info.h

 // Copyright (c) 2012 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_SYS_INFO_H_
 #define BASE_SYS_INFO_H_
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <string>
 
 #include "base/base_export.h"
 #include "base/files/file_path.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 
@@ skipping 118 matching lines @@
 
   // Returns true if this is a low-end device.
   // Low-end device refers to devices having less than 512M memory in the
   // current implementation.
   static bool IsLowEndDevice();
 };
 
 }  // namespace base
 
 #endif  // BASE_SYS_INFO_H_