Purge the App Launcher code from Windows.

chrome/installer/setup/install_worker.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.
 //
 // This file contains the definitions of the installer functions that build
 // the WorkItemList used to install the application.
 
 #include "chrome/installer/setup/install_worker.h"
 
 #include <oaidl.h>
@@ skipping 226 matching lines @@
        ++it) {
     const Product& p = **it;
     if (p.is_chrome()) {
       AddOsUpgradeWorkItems(installer_state, setup_path, new_version, p,
                             list);
       AddFirewallRulesWorkItems(installer_state, p.distribution(),
                                 current_version == nullptr, list);
 
 #if defined(GOOGLE_CHROME_BUILD)
       if (!InstallUtil::IsChromeSxSProcess()) {
-        // Add items to set up the App Launcher's version key if Google Chrome
-        // is being installed or updated.
-        AddAppLauncherVersionKeyWorkItems(installer_state.root_key(),
-            new_version, add_language_identifier, list);
+        // Remove the app launcher key as it has been deprecated.
+        RemoveAppLauncherVersionKey(installer_state.root_key());
       }
 #endif  // GOOGLE_CHROME_BUILD
       InstallUtil::AddUpdateDowngradeVersionItem(
           installer_state.system_install(), current_version, new_version,
           p.distribution(), list);
     }
     if (p.is_chrome_binaries())
       AddQuickEnableChromeFrameWorkItems(installer_state, list);
   }
 }
@@ skipping 1100 matching lines @@
   // Unconditionally remove the legacy Quick Enable command from the binaries.
   // Do this even if multi-install Chrome isn't installed to ensure that it is
   // not left behind in any case.
   work_item_list->AddDeleteRegKeyWorkItem(
                       installer_state.root_key(), cmd_key, KEY_WOW64_32KEY)
       ->set_log_message("removing " + base::UTF16ToASCII(kCmdQuickEnableCf) +
                         " command");
 }
 
 }  // namespace installer