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

chrome/browser/browser_process_platform_part_aurawin.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/browser_process_platform_part_aurawin.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/process/kill.h"
 #include "base/win/windows_version.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/first_run/upgrade_util.h"
 #include "chrome/browser/first_run/upgrade_util_win.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/notification_service.h"
 
 #include "ui/aura/remote_window_tree_host_win.h"
 
 BrowserProcessPlatformPart::BrowserProcessPlatformPart() {
-  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
+  if (base::win::GetVersion() >= base::win::VERSION_WIN7) {
     // Tell metro viewer to close when we are shutting down.
     registrar_.Add(this, chrome::NOTIFICATION_APP_TERMINATING,
                    content::NotificationService::AllSources());
   }
 }
 
 BrowserProcessPlatformPart::~BrowserProcessPlatformPart() {
 }
 
 void BrowserProcessPlatformPart::OnMetroViewerProcessTerminated() {
@@ skipping 38 matching lines @@
       if (mode == upgrade_util::RELAUNCH_MODE_DESKTOP) {
         // Metro -> Desktop
         chrome::ActivateDesktopHelper(chrome::ASH_TERMINATE);
       } else {
         // Metro -> Metro
         ChromeMetroViewerProcessHost::HandleMetroExit();
       }
     }
   }
 }