Revert "Remove aura and make a pure mojo::View version of the aura::Window FocusController."

mojo/services/window_manager/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")
 
+if (use_aura) {
+
 # GYP version: mojo/mojo_services.gypi:mojo_core_window_manager
 shared_library("window_manager") {
   sources = [ "main.cc" ]
 
   public_deps = [
     ":lib",
   ]
 
   deps = [
     "//base",
     "//mojo/application",
     "//mojo/public/c/system:for_shared_library",
     "//mojo/services/public/cpp/view_manager",
   ]
 }
 
 # GYP version: mojo/mojo_services.gypi:mojo_core_window_manager_lib
 source_set("lib") {
   sources = [
-    "basic_focus_rules.cc",
-    "basic_focus_rules.h",
-    "focus_controller.cc",
-    "focus_controller.h",
-    "focus_controller_observer.h",
-    "focus_rules.h",
     "native_viewport_event_dispatcher_impl.cc",
     "native_viewport_event_dispatcher_impl.h",
     "window_manager_app.cc",
     "window_manager_app.h",
     "window_manager_delegate.h",
     "window_manager_impl.cc",
     "window_manager_impl.h",
-    "view_event_dispatcher.cc",
-    "view_event_dispatcher.h",
-    "view_target.cc",
-    "view_target.h",
-    "view_targeter.cc",
-    "view_targeter.h",
+  ]
+
+  public_deps = [
+    "//mojo/aura",
   ]
 
   deps = [
     "//base",
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/wm",
+    "//mojo/aura",
     "//mojo/application",
     "//mojo/common",
     "//mojo/converters/input_events",
     "//mojo/services/public/cpp/view_manager",
     "//mojo/public/interfaces/application:application",
     "//mojo/services/public/interfaces/native_viewport",
     "//mojo/services/public/interfaces/window_manager",
   ]
 }
 
@@ skipping 14 matching lines @@
     "//mojo/services/public/interfaces/window_manager",
     "//mojo/shell:test_support",
     "//testing/gtest",
     "//ui/gl",
   ]
 
   if (use_x11) {
     deps += [ "//ui/gfx/x" ]
   }
 }
+
+}  # use_aura