Update from https://crrev.com/312398

shell/application_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("//mojo/public/tools/bindings/mojom.gni")
+import("//testing/test.gni")
 
 component("application_manager") {
   output_name = "mojo_application_manager"
   sources = [
     "application_loader.cc",
     "application_loader.h",
     "application_manager.cc",
     "application_manager.h",
     "application_manager_export.h",
     "shell_impl.cc",
@@ skipping 37 matching lines @@
     "//testing/gtest",
     "//url",
   ]
 }
 
 mojom("test_bindings") {
   sources = [
     "test.mojom",
   ]
 }