Allow compiling Android with notifications=1, add stubbed UI manager

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/debug/trace_event.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
@@ skipping 241 matching lines @@
 
 #if defined(ENABLE_AUTOFILL_DIALOG)
   autofill::AutofillDialogController::RegisterPrefs(registry);
 #endif
 
 #if defined(ENABLE_CONFIGURATION_POLICY)
   policy::BrowserPolicyConnector::RegisterPrefs(registry);
   policy::PolicyStatisticsCollector::RegisterPrefs(registry);
 #endif
 
-#if defined(ENABLE_NOTIFICATIONS)
+#if defined(ENABLE_NOTIFICATIONS) && !defined(OS_ANDROID)
+  // Android does not use the message center for notifications.
   MessageCenterNotificationManager::RegisterPrefs(registry);
 #endif
 
 #if defined(ENABLE_PLUGINS)
   PluginFinder::RegisterPrefs(registry);
 #endif
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   PluginsResourceService::RegisterPrefs(registry);
 #endif
@@ skipping 302 matching lines @@
     local_state->SetInteger(prefs::kMultipleProfilePrefMigration,
                             current_version);
   }
 
 #if defined(OS_CHROMEOS)
   chromeos::default_pinned_apps_field_trial::MigratePrefs(local_state);
 #endif
 }
 
 }  // namespace chrome