mash: Partially migrate ash/desktop_background to ash common types.

ash/ash.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # These files lists are shared with the GN build.
     'ash_sources': [
       'accelerators/accelerator_commands_aura.cc',
@@ skipping 631 matching lines @@
       'shelf/shelf_view.cc',
       'shelf/shelf_view.h',
       'shelf/shelf_widget.cc',
       'shelf/shelf_widget.h',
       'shelf/shelf_window_watcher.cc',
       'shelf/shelf_window_watcher.h',
       'shelf/shelf_window_watcher_item_delegate.cc',
       'shelf/shelf_window_watcher_item_delegate.h',
       'shell.cc',
       'shell.h',
-      'shell_factory.h',
       'shell_init_params.cc',
       'shell_init_params.h',
       'snap_to_pixel_layout_manager.cc',
       'snap_to_pixel_layout_manager.h',
       'sticky_keys/sticky_keys_controller.cc',
       'sticky_keys/sticky_keys_controller.h',
       'sticky_keys/sticky_keys_overlay.cc',
       'sticky_keys/sticky_keys_overlay.h',
       'sticky_keys/sticky_keys_state.h',
       'system/chromeos/power/power_event_observer.cc',
@@ skipping 129 matching lines @@
       'content/screen_orientation_delegate_chromeos.cc',
       'content/screen_orientation_delegate_chromeos.h',
       'content/shell_content_state.cc',
       'content/shell_content_state.h',
     ],
     'ash_test_support_sources': [
       'common/test/material_design_controller_test_api.cc',
       'common/test/material_design_controller_test_api.h',
       'common/test/test_volume_control_delegate.cc',
       'common/test/test_volume_control_delegate.h',
-      'desktop_background/desktop_background_controller_test_api.cc',
-      'desktop_background/desktop_background_controller_test_api.h',
       'shell/toplevel_window.cc',
       'shell/toplevel_window.h',
       'test/ash_md_test_base.cc',
       'test/ash_md_test_base.h',
       'test/ash_test_base.cc',
       'test/ash_test_base.h',
       'test/ash_test_helper.cc',
       'test/ash_test_helper.h',
       'test/ash_test_views_delegate.cc',
       'test/ash_test_views_delegate.h',
@@ skipping 665 matching lines @@
                   '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
                 ],
               }
             ],
           ],
         },
       ],
     }],
   ],
 }