Simplify mojo_shell since it's now only used for Mandoline.

mojo/services/kiosk_wm/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("//third_party/mojo/src/mojo/public/mojo_application.gni")
 import("$mojo_sdk_root/mojo/public/tools/bindings/mojom.gni")
 
-mojo_native_application("kiosk_wm") {
+# Mojo shell in chromium is only used for Mandoline, and Mandoline only uses
+# kiosk_wm, so we name the target window_manager to avoid having to remap on the
+# command line.
+mojo_native_application("window_manager") {
   sources = [
     "kiosk_wm.cc",
     "kiosk_wm.h",
     "main.cc",
     "merged_service_provider.cc",
     "merged_service_provider.h",
     "navigator_host_impl.cc",
     "navigator_host_impl.h",
   ]
 
   deps = [
     "//base",
     "//mojo/application",
     "//mojo/common:common",
     "//mojo/converters/geometry",
     "//mojo/converters/input_events",
     "//third_party/mojo/src/mojo/public/cpp/bindings",
     "//third_party/mojo/src/mojo/public/cpp/utility",
     "//third_party/mojo/src/mojo/public/interfaces/application",
     "//third_party/mojo_services/src/input_events/public/interfaces",
     "//third_party/mojo_services/src/navigation/public/interfaces",
     "//third_party/mojo_services/src/view_manager/public/cpp",
     "//mojo/services/window_manager:lib",
     "//ui/base",
   ]
 }