Make BackgroundBudgetService a KeyedService

chrome/chrome_browser.gypi

 # 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.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 492 matching lines @@
       'browser/prerender/prerender_util.cc',
       'browser/prerender/prerender_util.h',
       'browser/private_working_set_snapshot.h',
       'browser/private_working_set_snapshot_win.cc',
       'browser/process_resource_usage.cc',
       'browser/process_resource_usage.h',
       'browser/process_singleton.h',
       'browser/process_singleton_win.cc',
       'browser/push_messaging/background_budget_service.h',
       'browser/push_messaging/background_budget_service.cc',
+      'browser/push_messaging/background_budget_service_factory.h',
+      'browser/push_messaging/background_budget_service_factory.cc',
       'browser/push_messaging/push_messaging_app_identifier.cc',
       'browser/push_messaging/push_messaging_app_identifier.h',
       'browser/push_messaging/push_messaging_constants.cc',
       'browser/push_messaging/push_messaging_constants.h',
       'browser/push_messaging/push_messaging_permission_context.cc',
       'browser/push_messaging/push_messaging_permission_context.h',
       'browser/push_messaging/push_messaging_permission_context_factory.cc',
       'browser/push_messaging/push_messaging_permission_context_factory.h',
       'browser/push_messaging/push_messaging_service_factory.cc',
       'browser/push_messaging/push_messaging_service_factory.h',
@@ skipping 3700 matching lines @@
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
             'common',
           ],
         },
       ],
     }],
   ],
 }