Settings to control Add Person and Browse as Guest.

chrome/browser/profiles/profiles_state.cc

 // Copyright 2013 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/profiles_state.h"
 
 #include "base/files/file_path.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 23 matching lines @@
 }
 
 base::FilePath GetDefaultProfileDir(const base::FilePath& user_data_dir) {
   base::FilePath default_profile_dir(user_data_dir);
   default_profile_dir =
       default_profile_dir.AppendASCII(chrome::kInitialProfile);
   return default_profile_dir;
 }
 
 void RegisterPrefs(PrefRegistrySimple* registry) {
+  // Preferences about global profile information.
   registry->RegisterStringPref(prefs::kProfileLastUsed, std::string());
   registry->RegisterIntegerPref(prefs::kProfilesNumCreated, 1);
   registry->RegisterListPref(prefs::kProfilesLastActive);
+
+  // Preferences about the user manager.
+  registry->RegisterBooleanPref(prefs::kBrowserGuestModeEnabled, true);
+  registry->RegisterBooleanPref(prefs::kBrowserAddPersonEnabled, true);
 }
 
 base::string16 GetAvatarNameForProfile(const base::FilePath& profile_path) {
   base::string16 display_name;
 
   if (profile_path == ProfileManager::GetGuestProfilePath()) {
     display_name = l10n_util::GetStringUTF16(IDS_GUEST_PROFILE_NAME);
   } else {
     ProfileInfoCache& cache =
         g_browser_process->profile_manager()->GetProfileInfoCache();
@@ skipping 86 matching lines @@
   GAIAInfoUpdateServiceFactory::GetInstance()->GetForProfile(profile)->Update();
 }
 
 SigninErrorController* GetSigninErrorController(Profile* profile) {
   ProfileOAuth2TokenService* token_service =
       ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
   return token_service ? token_service->signin_error_controller() : NULL;
 }
 
 }  // namespace profiles