chromeos: Makes AshTestBase/Helper target mash when appropriate

components/exo/BUILD.gn

 # Copyright 2015 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("//testing/test.gni")
 
 source_set("exo") {
   sources = [
     "buffer.cc",
@@ skipping 137 matching lines @@
     "//ui/wm",
   ]
 
   if (use_ozone) {
     deps += [ "//ui/ozone" ]
   }
 }
 
 test("exo_unittests") {
   sources = [
+    "../../ash/test/ash_test_suite.cc",
+    "../../ash/test/ash_test_suite.h",
     "test/run_all_unittests.cc",
   ]
 
   deps = [
     ":unit_tests",
     "//ash/test:ash_with_aura_test_support",
     "//ash/test:test_support_without_content",
     "//base",
     "//base/test:test_support",
     "//device/gamepad:test_helpers",
     "//mojo/edk/embedder:headers",
+    "//testing/gtest",
+    "//ui/aura",
+    "//ui/base",
+    "//ui/gl:test_support",
   ]
 
   data_deps = [
     "//ash/common/strings:ash_test_strings",
     "//ash/resources:ash_test_resources_100_percent",
     "//ash/resources:ash_test_resources_200_percent",
   ]
 
   if (is_linux) {
     deps += [ "//components/exo/wayland:unit_tests" ]
   }
 }