arc: IPC method to set custom wallpaper.

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',
@@ skipping 61 matching lines @@
         'arc/metrics/oom_kills_monitor.cc',
         'arc/metrics/oom_kills_monitor.h',
         'arc/metrics/arc_metrics_service.cc',
         'arc/metrics/arc_metrics_service.h',
         'arc/net/arc_net_host_impl.cc',
         'arc/net/arc_net_host_impl.h',
         'arc/obb_mounter/arc_obb_mounter_bridge.cc',
         'arc/obb_mounter/arc_obb_mounter_bridge.h',
         'arc/power/arc_power_bridge.cc',
         'arc/power/arc_power_bridge.h',
+        'arc/set_wallpaper_delegate.h',
         'arc/storage_manager/arc_storage_manager.cc',
         'arc/storage_manager/arc_storage_manager.h',
         'arc/user_data/arc_user_data_service.cc',
         'arc/user_data/arc_user_data_service.h',
         'arc/window_manager/arc_window_manager_bridge.cc',
         'arc/window_manager/arc_window_manager_bridge.h',
       ],
     },
     {
       # GN version: //components/arc_test_support
@@ skipping 106 matching lines @@
         '../base/base.gyp:base',
         '../ipc/ipc.gyp:ipc',
         '../mojo/mojo_edk.gyp:mojo_system_impl',
       ],
       'sources': [
         'arc/standalone/arc_standalone_bridge_main.cc',
       ]
     }
   ],
 }