Update from https://crrev.com/312398

shell/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")
 import("//mojo/public/mojo.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
+import("//testing/test.gni")
 
 # We don't support building in the component build since mojo apps are
 # inherently components.
 assert(!is_component_build)
 
 group("shell") {
   testonly = true
 
   deps = [
     ":mojo_shell",
@@ skipping 478 matching lines @@
 
     deps -= [
       ":lib",
       ":external_application_registrar_connection",
       ":external_application_registrar_bindings",
       "//shell/domain_socket",
       "//shell/domain_socket:tests",
     ]
   }
 }