Callback flow to register Chrome and update shortcuts after OS upgrade to Windows 8

chrome/installer/setup/setup_main.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 <windows.h>
 #include <msi.h>
 #include <shellapi.h>
 #include <shlobj.h>
 
 #include "base/at_exit.h"
@@ skipping 1208 matching lines @@
         installer::ChromeFrameReadyModeTempOptOut(original_state,
                                                   *installer_state));
   } else if (cmd_line.HasSwitch(
                  installer::switches::kChromeFrameReadyModeEndTempOptOut)) {
     *exit_code = InstallUtil::GetInstallReturnCode(
         installer::ChromeFrameReadyModeEndTempOptOut(original_state,
                                                      *installer_state));
   } else if (cmd_line.HasSwitch(installer::switches::kChromeFrameQuickEnable)) {
     *exit_code = installer::ChromeFrameQuickEnable(original_state,
                                                    installer_state);
+  } else if (cmd_line.HasSwitch(installer::switches::kOnOsUpgrade)) {
+    *exit_code = InstallUtil::GetInstallReturnCode(
+        installer::OnOsUpgrade(original_state, *installer_state, cmd_line));
   } else {
     handled = false;
   }
 
   return handled;
 }
 
 bool ShowRebootDialog() {
   // Get a token for this process.
   HANDLE token;
@@ skipping 260 matching lines @@
   if (!(installer_state.is_msi() && is_uninstall))
     // Note that we allow the status installer::UNINSTALL_REQUIRES_REBOOT
     // to pass through, since this is only returned on uninstall which is
     // never invoked directly by Google Update.
     return_code = InstallUtil::GetInstallReturnCode(install_status);
 
   VLOG(1) << "Installation complete, returning: " << return_code;
 
   return return_code;
 }