mojo: terminate apps if the shell goes away

mojo/services/public/cpp/view_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.
 
 source_set("view_manager") {
   deps = [
     ":common",
     "//base",
-    "//mojo/public/cpp/application",
+    "//mojo/public/cpp/application:chromium",
     "//mojo/public/interfaces/application",
     "//mojo/services/public/cpp/geometry",
     "//mojo/services/public/interfaces/geometry",
     "//mojo/services/public/interfaces/view_manager",
     "//skia",
     "//ui/events",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
@@ skipping 17 matching lines @@
     "view_observer.h",
     "window_manager_delegate.h",
   ]
 }
 
 source_set("common") {
   sources = [
     "types.h"
   ]
 }