aura: Require explicit ownership of the Env instance.

ui/views/mus/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("//mojo/public/mojo_application.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
@@ skipping 56 matching lines @@
     "//mojo/public/c/system:for_component",
     "//mojo/public/cpp/bindings",
     "//mojo/shell/public/cpp",
     "//mojo/shell/public/interfaces",
     "//skia",
     "//third_party/icu",
     "//ui/aura",
     "//ui/compositor",
     "//ui/events",
     "//ui/events:events_base",
+    "//ui/events/devices",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/mojo/ime:interfaces_cpp_sources",
     "//ui/mojo/init",
     "//ui/native_theme",
     "//ui/platform_window",
     "//ui/views",
     "//ui/wm",
   ]
@@ skipping 142 matching lines @@
 }
 
 group("for_component") {
   public_deps = [
     ":mus",
   ]
   deps = [
     "//mojo/gles2",
   ]
 }