Remove multi-install from chrome/installer/setup.

chrome/installer/setup/app_launcher_installer.h

-// Copyright 2015 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.
-
-// The App Launcher is an adjunct product of Google Chrome, but it has a
-// distinct registry entry. The functions in this file tap into various points
-// in installer flow to update the App Launcher's registry, including the
-// removal of deprecated app commands. This concentrates ugly code to to one
-// place to facilitate future refactoring.
-
-#ifndef CHROME_INSTALLER_SETUP_APP_LAUNCHER_INSTALLER_H_
-#define CHROME_INSTALLER_SETUP_APP_LAUNCHER_INSTALLER_H_
-
-#if defined(GOOGLE_CHROME_BUILD)
-
-#include <windows.h>
-
-namespace base {
-class FilePath;
-}  // namespace base
-
-class WorkItemList;
-
-namespace installer {
-
-class InstallerState;
-
-// Remove App Launcher's registry key, so it is in sync with Google Chrome's.
-// Note: The key is added by App Launcher in SetDidRunForNDayActiveStats().
-void RemoveAppLauncherVersionKey(HKEY reg_root);
-
-// Adds work item to unconditionally remove legacy executables.
-void AddRemoveLegacyAppHostExeWorkItems(const base::FilePath& target_path,
-                                        const base::FilePath& temp_path,
-                                        WorkItemList* list);
-
-// Adds work item to unconditionally remove legacy app commands like
-// "install-application", "install-extension", and
-// "quick-enable-application-host".
-void AddRemoveLegacyAppCommandsWorkItems(
-    const InstallerState& installer_state,
-    WorkItemList* work_item_list);
-
-}  // namespace installer
-
-#endif  // defined(GOOGLE_CHROME_BUILD)
-
-#endif  // CHROME_INSTALLER_SETUP_APP_LAUNCHER_INSTALLER_H_