Creates BackgroundShell and uses it in test

ui/views/views.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,
     # Sources lists shared with GN build.
     'views_sources': [
       'accessibility/native_view_accessibility.cc',
       'accessibility/native_view_accessibility.h',
@@ skipping 564 matching lines @@
       'controls/textfield/textfield_model_unittest.cc',
       'controls/textfield/textfield_unittest.cc',
       'controls/tree/tree_view_unittest.cc',
       'event_monitor_unittest.cc',
       'focus/focus_manager_unittest.cc',
       'focus/focus_traversal_unittest.cc',
       'layout/box_layout_unittest.cc',
       'layout/grid_layout_unittest.cc',
       'rect_based_targeting_utils_unittest.cc',
       'run_all_unittests.cc',
+      'run_all_unittests.h',
+      'run_all_unittests_main.cc',
       'style/mac/dialog_button_border_mac_unittest.cc',
       'view_model_unittest.cc',
       'view_model_utils_unittest.cc',
       'view_targeter_unittest.cc',
       'view_unittest.cc',
       'widget/native_widget_mac_unittest.mm',
       'widget/native_widget_unittest.cc',
       'widget/root_view_unittest.cc',
       'widget/widget_unittest.cc',
       'widget/window_reorderer_unittest.cc',
@@ skipping 351 matching lines @@
             '../compositor/compositor.gyp:compositor_test_support',
             '../resources/ui_resources.gyp:ui_resources',
             '../resources/ui_resources.gyp:ui_test_pak',
             '../strings/ui_strings.gyp:ui_strings',
             'views',
             'views_test_support',
           ],
           'sources': [
             'cocoa/bridged_native_widget_interactive_uitest.mm',
             'run_all_unittests.cc',
+            'run_all_unittests.h',
+            'run_all_unittests_main.cc',
             'widget/native_widget_mac_interactive_uitest.mm',
           ],
           'conditions': [
             ['use_aura == 1', {
               'dependencies': [
                 '../aura/aura.gyp:aura',
                 '../wm/wm.gyp:wm',
               ],
             }],
           ],
         },  # target_name: macviews_interactive_ui_tests
       ],  # targets
     }],
   ],  # conditions
 }