GN build rules for all unit test targets in mojo/

mojo/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")
+
 group("mojo") {
   deps = [
     ":tests",
     "//mojo/common",
     "//mojo/examples",
     "//mojo/public",
     "//mojo/services",
     "//mojo/shell:mojo_shell",
   ]
 }
 
 group("tests") {
   deps = [
     "//mojo/application_manager:mojo_application_manager_unittests",
     "//mojo/apps/js/test:mojo_apps_js_unittests",
     "//mojo/common:mojo_common_unittests",
     "//mojo/public/cpp/application/tests:mojo_public_application_unittests",
     "//mojo/public/cpp/bindings/tests:mojo_public_bindings_unittests",
     "//mojo/public/cpp/environment/tests:mojo_public_environment_unittests",
     "//mojo/public/cpp/system/tests:mojo_public_system_unittests",
     "//mojo/public/cpp/utility/tests:mojo_public_utility_unittests",
     "//mojo/public/js/bindings/tests:mojo_js_unittests",
     "//mojo/services/public/cpp/surfaces/tests:mojo_surfaces_lib_unittests",
     "//mojo/shell:mojo_shell_tests",
     "//mojo/system:mojo_system_unittests",
   ]
+
+  if (use_aura) {
+    deps += [
+      "//mojo/services/public/cpp/view_manager/tests:mojo_view_manager_lib_unittests",
+      "//mojo/services/view_manager:mojo_view_manager_unittests",
+      "//mojo/services/window_manager:mojo_core_window_manager_unittests",
+    ]
+  }
 }
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 
   generate_jni("jni_headers") {
     sources = [
       "android/javatests/src/org/chromium/mojo/MojoTestCase.java",
       "android/system/src/org/chromium/mojo/system/impl/CoreImpl.java",
       "services/native_viewport/android/src/org/chromium/mojo/PlatformViewportAndroid.java",
     ]
 
     jni_package = "mojo"
   }
 }