Introduce NON_ZERO_DURATION for animation unit tests

ui/wm/core/visibility_controller_unittest.cc

 // Copyright (c) 2012 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/wm/core/visibility_controller.h"
 
 #include "ui/aura/test/aura_test_base.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/test/test_windows.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animator.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 
 namespace wm {
 
 typedef aura::test::AuraTestBase VisibilityControllerTest;
 
 // Check that a transparency change to 0 will not cause a hide call to be
 // ignored.
 TEST_F(VisibilityControllerTest, AnimateTransparencyToZeroAndHideHides) {
   // We cannot disable animations for this test.
-  ui::ScopedAnimationDurationScaleMode normal_duration_mode(
-      ui::ScopedAnimationDurationScaleMode::NORMAL_DURATION);
+  ui::ScopedAnimationDurationScaleMode test_duration_mode(
+      ui::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION);
 
   VisibilityController controller;
   aura::client::SetVisibilityClient(root_window(), &controller);
 
   SetChildWindowVisibilityChangesAnimated(root_window());
 
   aura::test::TestWindowDelegate d;
   scoped_ptr<aura::Window> window(aura::test::CreateTestWindowWithDelegate(
       &d, -2, gfx::Rect(0, 0, 50, 50), root_window()));
   ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
@@ skipping 10 matching lines @@
   EXPECT_EQ(0.0f, window->layer()->GetTargetOpacity());
 
   // Check that the visibility is correct after the hide animation has finished.
   window->Hide();
   window->layer()->GetAnimator()->StopAnimating();
   EXPECT_FALSE(window->layer()->visible());
   EXPECT_FALSE(window->IsVisible());
 }
 
 }  // namespace wm