reland -- Disable animations during aura tests.

ash/wm/window_animations.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 "ash/wm/window_animations.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 106 matching lines @@
 // its transform to |end_transform|.
 void AnimateHideWindowCommon(aura::Window* window,
                              const ui::Transform& end_transform) {
   // The window's layer was just hidden, but we need it to draw until it's fully
   // transparent, so we show it again. This is undone once the animation is
   // complete.
   window->layer()->SetVisible(true);
   {
     // Property sets within this scope will be implicitly animated.
     ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
-    settings.AddImplicitObserver(new HidingWindowAnimationObserver(window));
+    settings.AddObserver(new HidingWindowAnimationObserver(window));
 
     window->layer()->SetOpacity(kWindowAnimation_HideOpacity);
     window->layer()->SetTransform(end_transform);
   }
 }
 
 // Show/Hide windows using a shrink animation.
 void AnimateShowWindow_Drop(aura::Window* window) {
   ui::Transform transform;
   transform.ConcatScale(kWindowAnimation_ScaleFactor,
@@ skipping 82 matching lines @@
     AnimateShowWindow(window);
   } else {
     // Don't start hiding the window again if it's already being hidden.
     if (window->layer()->GetTargetOpacity() != 0.0f)
       AnimateHideWindow(window);
   }
 }
 
 }  // namespace internal
 }  // namespace ash