aura-mus: Implement stacking in DesktopWindowTreeHostMus.

ui/aura/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/ui.gni")
 import("//testing/test.gni")
 
 component("aura") {
   sources = [
     "../wm/public/activation_change_observer.cc",
@@ skipping 92 matching lines @@
     "mus/window_manager_delegate.cc",
     "mus/window_manager_delegate.h",
     "mus/window_mus.h",
     "mus/window_port_mus.cc",
     "mus/window_port_mus.h",
     "mus/window_tree_client.cc",
     "mus/window_tree_client.h",
     "mus/window_tree_client_delegate.cc",
     "mus/window_tree_client_delegate.h",
     "mus/window_tree_client_observer.h",
+    "mus/window_tree_client_test_observer.h",
     "mus/window_tree_host_mus.cc",
     "mus/window_tree_host_mus.h",
     "mus/window_tree_host_mus_delegate.h",
     "scoped_window_targeter.cc",
     "scoped_window_targeter.h",
     "window.cc",
     "window.h",
     "window_delegate.h",
     "window_event_dispatcher.cc",
     "window_event_dispatcher.h",
@@ skipping 103 matching lines @@
     "test/aura_test_base.h",
     "test/aura_test_helper.cc",
     "test/aura_test_helper.h",
     "test/aura_test_utils.cc",
     "test/aura_test_utils.h",
     "test/env_test_helper.h",
     "test/event_generator_delegate_aura.cc",
     "test/event_generator_delegate_aura.h",
     "test/input_method_glue.cc",
     "test/input_method_glue.h",
+    "test/mus/change_completion_waiter.cc",
+    "test/mus/change_completion_waiter.h",
     "test/mus/test_window_tree.cc",
     "test/mus/test_window_tree.h",
     "test/mus/test_window_tree_client_setup.cc",
     "test/mus/test_window_tree_client_setup.h",
     "test/mus/window_tree_client_private.cc",
     "test/mus/window_tree_client_private.h",
     "test/test_cursor_client.cc",
     "test/test_cursor_client.h",
     "test/test_focus_client.cc",
     "test/test_focus_client.h",
@@ skipping 122 matching lines @@
   ]
 
   if (is_linux) {
     deps += [ "//third_party/mesa" ]
   }
 
   data_deps = [
     "//third_party/mesa:osmesa",
   ]
 }