Introduce window container to be used by lock screen app windows

ash/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 # Historical note: Ash shipped on Windows for a couple years to support
@@ skipping 640 matching lines @@
     "wm/gestures/overview_gesture_handler.cc",
     "wm/gestures/overview_gesture_handler.h",
     "wm/immersive_context_ash.cc",
     "wm/immersive_context_ash.h",
     "wm/immersive_focus_watcher_aura.cc",
     "wm/immersive_focus_watcher_aura.h",
     "wm/immersive_gesture_handler_aura.cc",
     "wm/immersive_gesture_handler_aura.h",
     "wm/immersive_handler_factory_ash.cc",
     "wm/immersive_handler_factory_ash.h",
+    "wm/lock_action_handler_layout_manager.cc",
+    "wm/lock_action_handler_layout_manager.h",
     "wm/lock_layout_manager.cc",
     "wm/lock_layout_manager.h",
     "wm/lock_state_controller.cc",
     "wm/lock_state_controller.h",
     "wm/lock_state_observer.h",
     "wm/lock_window_state.cc",
     "wm/lock_window_state.h",
     "wm/maximize_mode/maximize_mode_backdrop_delegate_impl.cc",
     "wm/maximize_mode/maximize_mode_backdrop_delegate_impl.h",
     "wm/maximize_mode/maximize_mode_controller.cc",
@@ skipping 720 matching lines @@
 
     # TODO: mash doesn't support DragWindowResizer. http://crbug.com/633782.
     "wm/drag_window_resizer_unittest.cc",
 
     # TODO: mash doesn't support OverviewGestureHandler.
     # http://crbug.com/634994.
     "wm/gestures/overview_gesture_handler_unittest.cc",
 
     # TODO: fails because keyboard is not enabled in mash.
     # http://crbug.com/648733.
+    "wm/lock_action_handler_layout_manager_unittest.cc",
+
+    # TODO: fails because keyboard is not enabled in mash.
+    # http://crbug.com/648733.
     "wm/lock_layout_manager_unittest.cc",
 
     # TODO: investigate failures in mash. http://crbug.com/698092.
     "wm/maximize_mode/maximize_mode_controller_unittest.cc",
 
     # TODO: mash doesn't support CursorManager. http://crbug.com/631103.
     "wm/resize_shadow_and_cursor_unittest.cc",
 
     # TODO: mash doesn't support SetFirstDisplayAsInternalDisplay(), which all
     # the tests in this file use. http://crbug.com/698091.
@@ skipping 103 matching lines @@
     "//content/public/app:both",
     "//device/bluetooth",
   ]
 
   data_deps = [
     "//ash/strings:ash_test_strings",
     "//ash/resources:ash_test_resources_with_content_100_percent",
     "//ash/resources:ash_test_resources_200_percent",
   ]
 }