Initialize MaterialDesignController in NativeThemeMacTest

ui/native_theme/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("//testing/test.gni")
 
 component("native_theme") {
   sources = [
     "common_theme.cc",
@@ skipping 63 matching lines @@
   if (is_mac) {
     sources += [ "native_theme_mac_unittest.cc" ]
   }
 
   deps = [
     ":native_theme",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//skia:skia",
     "//testing/gtest",
+    "//ui/base",
     "//ui/gfx/geometry:geometry",
   ]
 }