* Invoke Google Update to do the exe rename.

chrome/installer/setup/install.cc

 // Copyright (c) 2006-2008 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 <time.h>
 
 #include "base/file_util.h"
 #include "base/registry.h"
 #include "base/scoped_ptr.h"
 #include "base/string_util.h"
@@ skipping 210 matching lines @@
   // current version in old version key.
   // * If new_chrome.exe doesnt exist, then delete old version key.
   if (success) {
     if (file_util::PathExists(new_chrome_exe)) {
       if (current_version.empty()) {
         LOG(ERROR) << "New chrome.exe exists but current version is empty!";
         success = false;
       } else {
         scoped_ptr<WorkItemList> inuse_list(WorkItem::CreateWorkItemList());
         inuse_list->AddSetRegValueWorkItem(reg_root,
-                                           version_key, 
+                                           version_key,
                                            google_update::kRegOldVersionField,
                                            current_version.c_str(),
                                            true);
         std::wstring rename_cmd(installer::GetInstallerPathUnderChrome(
             install_path, new_version.GetString()));
         file_util::AppendToPath(&rename_cmd,
                                 file_util::GetFilenameFromPath(exe_path));
-        rename_cmd = L"\"" + rename_cmd + L"\" --" +
-                                  installer_util::switches::kRenameChromeExe;
+        rename_cmd = L"\"" + rename_cmd +
+                     L"\" --" + installer_util::switches::kRenameChromeExe;
+        if (reg_root == HKEY_LOCAL_MACHINE) {
+          rename_cmd = rename_cmd + L" --" +
+                       installer_util::switches::kSystemLevel;
+        }
         inuse_list->AddSetRegValueWorkItem(reg_root,
-                                           version_key, 
+                                           version_key,
                                            google_update::kRegRenameCmdField,
                                            rename_cmd.c_str(),
                                            true);
         if (!inuse_list->Do()) {
           LOG(ERROR) << "Couldn't write old version/rename value to registry.";
           success = false;
           inuse_list->Rollback();
         }
       }
     } else {
       scoped_ptr<WorkItemList> inuse_list(WorkItem::CreateWorkItemList());
-      inuse_list->AddDeleteRegValueWorkItem(reg_root, version_key, 
+      inuse_list->AddDeleteRegValueWorkItem(reg_root, version_key,
                                             google_update::kRegOldVersionField,
                                             true);
-      inuse_list->AddDeleteRegValueWorkItem(reg_root, version_key, 
+      inuse_list->AddDeleteRegValueWorkItem(reg_root, version_key,
                                             google_update::kRegRenameCmdField,
                                             true);
       if (!inuse_list->Do()) {
         LOG(ERROR) << "Couldn't write old version/rename value to registry.";
         success = false;
         inuse_list->Rollback();
       }
     }
   }
 
   if (!success) {
     LOG(ERROR) << "Install failed, rolling back... ";
     install_list->Rollback();
     LOG(ERROR) << "Rollback complete. ";
   }
   return success;
 }