Battery Status API: browser-side implementation.

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 302 matching lines @@
       'browser/appcache/appcache_frontend_proxy.h',
       'browser/appcache/appcache_interceptor.cc',
       'browser/appcache/appcache_interceptor.h',
       'browser/appcache/chrome_appcache_service.cc',
       'browser/appcache/chrome_appcache_service.h',
       'browser/appcache/view_appcache_internals_job.h',
       'browser/appcache/view_appcache_internals_job.cc',
       'browser/battery_status/battery_status_manager_android.cc',
       'browser/battery_status/battery_status_manager_default.cc',
       'browser/battery_status/battery_status_manager.h',
-      'browser/battery_status/battery_status_update_callback.h',
+      'browser/battery_status/battery_status_message_filter.cc',
+      'browser/battery_status/battery_status_message_filter.h',
+      'browser/battery_status/battery_status_service.cc',
+      'browser/battery_status/battery_status_service.h',
       'browser/browser_child_process_host_impl.cc',
       'browser/browser_child_process_host_impl.h',
       'browser/browser_context.cc',
       'browser/browser_ipc_logging.cc',
       'browser/browser_main.cc',
       'browser/browser_main.h',
       'browser/browser_main_loop.cc',
       'browser/browser_main_loop.h',
       'browser/browser_main_runner.cc',
       'browser/browser_plugin/browser_plugin_embedder.cc',
@@ skipping 1411 matching lines @@
         '../build/linux/system.gyp:dbus',
         '../dbus/dbus.gyp:dbus',
       ],
     }, {  # OS != "linux" or use_dbus==0
       'sources!': [
         'browser/geolocation/wifi_data_provider_linux.cc',
       ],
     }],
   ],
 }