ash/mash: Fix launching ash as a mus-app in chromeos.

ash/mus/BUILD.gn

 # 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") {
@@ skipping 26 matching lines @@
     "//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",
   ]
+
+  if (is_chromeos) {
+    deps += [
+      "//chromeos",
+      "//device/bluetooth",
+      "//ui/events/devices",
+    ]
+  }
 }
 
 mojo_native_application("mus") {
   output_name = "ash_sysui"
   sources = [
     "main.cc",
   ]
   deps = [
     ":lib",
   ]
 }