Allow normal users to change per session flags.

chrome/browser/prefs/browser_prefs.cc

 // Copyright 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/prefs/browser_prefs.h"
 
 #include "apps/prefs.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/about_flags.h"
@@ skipping 332 matching lines @@
 #endif
 
 #if !defined(OS_ANDROID) && !defined(OS_CHROMEOS)
   default_apps::RegisterUserPrefs(registry);
 #endif
 
 #if defined(OS_CHROMEOS)
   chromeos::OAuth2LoginManager::RegisterUserPrefs(registry);
   chromeos::Preferences::RegisterUserPrefs(registry);
   chromeos::ProxyConfigServiceImpl::RegisterUserPrefs(registry);
+  FlagsUI::RegisterUserPrefs(registry);
 #endif
 
 #if defined(OS_WIN)
   NetworkProfileBubble::RegisterUserPrefs(registry);
 #endif
 
   // Prefs registered only for migration (clearing or moving to a new
   // key) go here.
   registry->RegisterDictionaryPref(kBackupPref, new DictionaryValue(),
                                    PrefRegistrySyncable::UNSYNCABLE_PREF);
@@ skipping 74 matching lines @@
     }
     local_state->ClearPref(prefs::kLastPromptedGoogleURL);
 
     current_version |= GOOGLE_URL_TRACKER_PREFS;
     local_state->SetInteger(prefs::kMultipleProfilePrefMigration,
                             current_version);
   }
 }
 
 }  // namespace chrome