Add hooks to allow lock screen app pages in sign-in profile

chrome/browser/profiles/profile_manager.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 "chrome/browser/profiles/profile_manager.h"
 
 #include <stdint.h>
 
 #include <map>
 #include <set>
@@ skipping 1189 matching lines @@
   TRACE_EVENT0("browser", "ProfileManager::DoFinalInitForServices");
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)
   bool extensions_enabled = !go_off_the_record;
 #if defined(OS_CHROMEOS)
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableLoginScreenApps) &&
       chromeos::ProfileHelper::IsSigninProfile(profile)) {
     extensions_enabled = true;
   }
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          chromeos::switches::kEnableLockScreenApps) &&
+      chromeos::ProfileHelper::IsSigninProfile(profile)) {
+    extensions_enabled = true;
+  }
 #endif
   extensions::ExtensionSystem::Get(profile)->InitForRegularProfile(
       extensions_enabled);
 
   // Set the block extensions bit on the ExtensionService. There likely are no
   // blockable extensions to block.
   ProfileAttributesEntry* entry;
   bool has_entry = GetProfileAttributesStorage().
                        GetProfileAttributesWithPath(profile->GetPath(), &entry);
   if (has_entry && entry->IsSigninRequired()) {
@@ skipping 545 matching lines @@
 
   const base::FilePath new_active_profile_dir =
       found_entry ? found_entry->GetPath() : GenerateNextProfileDirectoryPath();
   FinishDeletingProfile(profile_dir, new_active_profile_dir);
 }
 #endif  // !defined(OS_ANDROID)
 
 ProfileManagerWithoutInit::ProfileManagerWithoutInit(
     const base::FilePath& user_data_dir) : ProfileManager(user_data_dir) {
 }