Revert of Remove installation of Chrome Frame.

chrome/installer/setup/install_worker.h

 // 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.
 //
 // This file contains the declarations of the installer functions that build
 // the WorkItemList used to install the application.
 
 #ifndef CHROME_INSTALLER_SETUP_INSTALL_WORKER_H_
 #define CHROME_INSTALLER_SETUP_INSTALL_WORKER_H_
 
@@ skipping 140 matching lines @@
                              const base::Version& new_version,
                              const Product& product,
                              WorkItemList* list);
 
 // Unregisters the "opv" version of ChromeLauncher from IE's low rights
 // elevation policy.
 void AddDeleteOldIELowRightsPolicyWorkItems(
     const InstallerState& installer_state,
     WorkItemList* install_list);
 
+// Adds work items to copy IE low rights policies for an in-use update.
+void AddCopyIELowRightsPolicyWorkItems(const InstallerState& installer_state,
+                                       WorkItemList* install_list);
+
 // Utility method currently shared between install.cc and install_worker.cc
 void AppendUninstallCommandLineFlags(const InstallerState& installer_state,
                                      const Product& product,
                                      CommandLine* uninstall_cmd);
 
 // Refreshes the elevation policy on platforms where it is supported.
 void RefreshElevationPolicy();
 
 // Adds work items to add or remove the "on-os-upgrade" command to |product|'s
 // version key on the basis of the current operation (represented in
@@ skipping 16 matching lines @@
                                      WorkItemList* work_item_list);
 
 // Adds work items to remove "quick-enable-cf" from the multi-installer
 // binaries' version key.
 void AddQuickEnableChromeFrameWorkItems(const InstallerState& installer_state,
                                         WorkItemList* work_item_list);
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_SETUP_INSTALL_WORKER_H_