ash/mash: Add a mus-client that sets up ash to provide the system ui for mash.

ash/mus/BUILD.gn

Index: ash/mus/BUILD.gn
diff --git a/ash/mus/BUILD.gn b/ash/mus/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..11b4527c2e5906159969f0e6b22e4551c6a0f411
--- /dev/null
+++ b/ash/mus/BUILD.gn
@@ -0,0 +1,55 @@
+# Copyright 2016 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("//mojo/public/mojo_application.gni")
+import("//mojo/public/tools/bindings/mojom.gni")
+import("//tools/grit/repack.gni")
+
+source_set("lib") {
+  sources = [
+    "shell_delegate_mus.cc",
+    "shell_delegate_mus.h",
+    "stub_context_factory.cc",
+    "stub_context_factory.h",
+    "sysui_application.cc",
+    "sysui_application.h",
+  ]
+
+  deps = [
+    "//ash",
+    "//components/mus/common",
+    "//components/mus/public/cpp",
+    "//components/mus/public/interfaces",
+    "//components/user_manager",
+    "//mash/wm/public/interfaces",
+    "//mojo/common:common_base",
+    "//mojo/converters/geometry",
+    "//mojo/converters/input_events",
+    "//mojo/services/tracing/public/cpp",
+    "//mojo/shell/public/cpp",
+    "//skia",
+    "//ui/aura",
+    "//ui/events",
+    "//ui/gfx",
+    "//ui/gfx/geometry",
+    "//ui/message_center",
+    "//ui/mojo/init",
+    "//ui/platform_window/stub",
+    "//ui/resources",
+    "//ui/strings",
+    "//ui/views",
+    "//ui/views/mus:for_mojo_application",
+  ]
+}
+
+mojo_native_application("mus") {
+  output_name = "ash_sysui"
+  sources = [
+    "main.cc",
+  ]
+  deps = [
+    ":lib",
+  ]
+}