Add GamepadService, owns 1 gamepad bg thread

content/content_browser.gypi

 # Copyright (c) 2011 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': [
     '../crypto/crypto.gyp:crypto',
     '../net/net.gyp:http_server',
     '../net/net.gyp:net',
     '../ppapi/ppapi_internal.gyp:ppapi_proxy',
@@ skipping 192 matching lines @@
     'browser/file_system/file_system_dispatcher_host.h',
     'browser/find_pasteboard.h',
     'browser/find_pasteboard.mm',
     'browser/font_list_async.cc',
     'browser/font_list_async.h',
     'browser/gamepad/data_fetcher.h',
     'browser/gamepad/data_fetcher_win.cc',
     'browser/gamepad/data_fetcher_win.h',
     'browser/gamepad/gamepad_provider.cc',
     'browser/gamepad/gamepad_provider.h',
+    'browser/gamepad/gamepad_service.cc',
+    'browser/gamepad/gamepad_service.h',
     'browser/geolocation/access_token_store.cc',
     'browser/geolocation/access_token_store.h',
     'browser/geolocation/arbitrator_dependency_factory.cc',
     'browser/geolocation/arbitrator_dependency_factory.h',
     'browser/geolocation/core_location_data_provider_mac.h',
     'browser/geolocation/core_location_data_provider_mac.mm',
     'browser/geolocation/core_location_provider_mac.h',
     'browser/geolocation/core_location_provider_mac.mm',
     'browser/geolocation/device_data_provider.cc',
     'browser/geolocation/device_data_provider.h',
@@ skipping 569 matching lines @@
         'ENABLE_JAVA_BRIDGE',
       ],
     }, {
       'sources/': [
         ['exclude', '^browser/renderer_host/java/'],
       ],
     }],
   ],
 }