Add relaunch into ASH and desktop support for Chrome on Windows 7.

chrome/browser/browser_process_impl.cc

 // 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.
 
 #include "chrome/browser/browser_process_impl.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
@@ skipping 765 matching lines @@
                                 net::kDefaultMaxSocketsPerProxyServer);
 
   registry->RegisterBooleanPref(prefs::kAllowCrossOriginAuthPrompt, false);
 
   registry->RegisterBooleanPref(prefs::kBrowserGuestModeEnabled, true);
 
 #if defined(OS_CHROMEOS) || defined(OS_ANDROID) || defined(OS_IOS)
   registry->RegisterBooleanPref(prefs::kEulaAccepted, false);
 #endif  // defined(OS_CHROMEOS) || defined(OS_ANDROID) || defined(OS_IOS)
 #if defined(OS_WIN)
-  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
+  if (base::win::GetVersion() >= base::win::VERSION_WIN7) {
     registry->RegisterStringPref(prefs::kRelaunchMode,
                                  upgrade_util::kRelaunchModeDefault);
   }
 #endif
 
   // TODO(brettw,*): this comment about ResourceBundle was here since
   // initial commit.  This comment seems unrelated, bit-rotten and
   // a candidate for removal.
   // Initialize ResourceBundle which handles files loaded from external
   // sources. This has to be done before uninstall code path and before prefs
@@ skipping 415 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)