Update Windows version macros to Win 7

base/win/win_util.h

 // Copyright (c) 2011 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.
 
 // =============================================================================
 // PLEASE READ
 //
 // In general, you should not be adding stuff to this file.
 //
 // - If your thing is only used in one place, just put it in a reasonable
@@ skipping 69 matching lines @@
 // Removes the command specified by |name| from the AutoRun key. |root_key|
 // could be HKCU or HKLM or the root of any user hive.
 BASE_EXPORT bool RemoveCommandFromAutoRun(HKEY root_key, const string16& name);
 
 // Reads the command specified by |name| from the AutoRun key. |root_key|
 // could be HKCU or HKLM or the root of any user hive. Used for unit-tests.
 BASE_EXPORT bool ReadCommandFromAutoRun(HKEY root_key,
                                         const string16& name,
                                         string16* command);
 
+// Get the size of a struct up to and including the specified member.
+// This is necessary to set compatible struct sizes for different versions
+// of certain Windows APIs (e.g. SystemParametersInfo).
+#define SIZEOF_STRUCT_WITH_SPECIFIED_LAST_MEMBER(struct_name, member) \
+    offsetof(struct_name, member) + \
+    (sizeof static_cast<struct_name*>(NULL)->member)
+
 }  // namespace win
 }  // namespace base
 
 #endif  // BASE_WIN_WIN_UTIL_H_