MacViews: Disable animations when running views_unittests.

ui/views/test/views_test_helper_mac.mm

 // 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.
 
-#include "ui/views/test/views_test_helper.h"
+#include "ui/views/test/views_test_helper_mac.h"
+
+#include "ui/compositor/scoped_animation_duration_scale_mode.h"
 
 namespace views {
 
-#if !defined(USE_AURA)
 // static
 ViewsTestHelper* ViewsTestHelper::Create(base::MessageLoopForUI* message_loop,
                                          ui::ContextFactory* context_factory) {
-  return new ViewsTestHelper;
-}
-#endif
-
-ViewsTestHelper::ViewsTestHelper() {
+  return new ViewsTestHelperMac;
 }
 
-ViewsTestHelper::~ViewsTestHelper() {
+ViewsTestHelperMac::ViewsTestHelperMac()
+    : zero_duration_mode_(new ui::ScopedAnimationDurationScaleMode(
+          ui::ScopedAnimationDurationScaleMode::ZERO_DURATION)) {
 }
 
-void ViewsTestHelper::SetUp() {
-}
-
-void ViewsTestHelper::TearDown() {
-}
-
-gfx::NativeView ViewsTestHelper::GetContext() {
-  return NULL;
+ViewsTestHelperMac::~ViewsTestHelperMac() {
 }
 
 }  // namespace views