Use GetVersion for Windows run-time version checks in preference to OperatingSystemVersionNumbers

net/socket/tcp_client_socket_win.cc

 // 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.
 
 #include "net/socket/tcp_client_socket_win.h"
 
 #include <mstcpip.h>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/memory_debug.h"
 #include "base/metrics/stats_counters.h"
 #include "base/string_util.h"
-#include "base/sys_info.h"
 #include "base/win/object_watcher.h"
+#include "base/win/windows_version.h"
 #include "net/base/address_list_net_log_param.h"
 #include "net/base/connection_type_histograms.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 #include "net/base/net_util.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/sys_addrinfo.h"
 #include "net/base/winsock_init.h"
@@ skipping 23 matching lines @@
   // Increase the socket buffer sizes from the default sizes for WinXP.  In
   // performance testing, there is substantial benefit by increasing from 8KB
   // to 64KB.
   // See also:
   //    http://support.microsoft.com/kb/823764/EN-US
   // On Vista, if we manually set these sizes, Vista turns off its receive
   // window auto-tuning feature.
   //    http://blogs.msdn.com/wndp/archive/2006/05/05/Winhec-blog-tcpip-2.aspx
   // Since Vista's auto-tune is better than any static value we can could set,
   // only change these on pre-vista machines.
-  int32 major_version, minor_version, fix_version;
-  base::SysInfo::OperatingSystemVersionNumbers(&major_version, &minor_version,
-    &fix_version);
-  if (major_version < 6) {
+  if (base::win::GetVersion() < base::win::VERSION_VISTA) {
     const int32 kSocketBufferSize = 64 * 1024;
     SetSocketReceiveBufferSize(socket, kSocketBufferSize);
     SetSocketSendBufferSize(socket, kSocketBufferSize);
   }
 
   // Disable Nagle.
   // The Nagle implementation on windows is governed by RFC 896.  The idea
   // behind Nagle is to reduce small packets on the network.  When Nagle is
   // enabled, if a partial packet has been sent, the TCP stack will disallow
   // further *partial* packets until an ACK has been received from the other
@@ skipping 823 matching lines @@
         use_history_.set_was_used_to_convey_data();
       net_log_.AddByteTransferEvent(NetLog::TYPE_SOCKET_BYTES_SENT, num_bytes,
                                     core_->write_buffer_.buf);
     }
   }
   core_->write_iobuffer_ = NULL;
   DoWriteCallback(rv);
 }
 
 }  // namespace net