chromeos: Add ArcInputBridge to components/arc

components/arc.gypi

 # Copyright 2015 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.
 
 {
   'targets': [
     {
       # GN version: //components/arc
       'target_name': 'arc',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../base/base.gyp:base',
       ],
       'sources': [
+        'arc/arc_bridge_input_devices.cc',
         'arc/arc_bridge_service.cc',
         'arc/arc_bridge_service_factory.cc',
         'arc/arc_pref_names.cc',
       ],
     },
   ],
 }