reland -- Disable animations during aura tests.

ui/gfx/compositor/scoped_layer_animation_settings.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/gfx/compositor/scoped_layer_animation_settings.h"
 
 #include "ui/gfx/compositor/layer_animation_observer.h"
 #include "ui/gfx/compositor/layer_animator.h"
 
 namespace {
 
 static const base::TimeDelta kDefaultTransitionDuration =
     base::TimeDelta::FromMilliseconds(200);
 
 } // namespace;
 
 namespace ui {
 
 ScopedLayerAnimationSettings::ScopedLayerAnimationSettings(
     LayerAnimator* animator)
     : animator_(animator),
       old_transition_duration_(animator->transition_duration_) {
   SetTransitionDuration(kDefaultTransitionDuration);
 }
 
 ScopedLayerAnimationSettings::~ScopedLayerAnimationSettings() {
   animator_->transition_duration_ = old_transition_duration_;
 
   for (std::set<LayerAnimationObserver*>::const_iterator i =
-       observers_.begin(); i != observers_.end(); ++i)
-      animator_->observers_.RemoveObserver(*i);
-
-  for (std::set<ImplicitAnimationObserver*>::const_iterator i =
-       implicit_observers_.begin(); i != implicit_observers_.end(); ++i)
-      (*i)->SetActive(true);
+       observers_.begin(); i != observers_.end(); ++i) {
+    animator_->observers_.RemoveObserver(*i);
+    ImplicitAnimationObserver* implicit_observer = (*i)->AsImplicitObserver();
+    if (implicit_observer)
+      implicit_observer->SetActive(true);
+  }
 }
 
 void ScopedLayerAnimationSettings::AddObserver(
     LayerAnimationObserver* observer) {
   observers_.insert(observer);
   animator_->AddObserver(observer);
 }
 
-void ScopedLayerAnimationSettings::AddImplicitObserver(
-    ImplicitAnimationObserver* observer) {
-  implicit_observers_.insert(observer);
-  AddObserver(observer);
-}
-
 void ScopedLayerAnimationSettings::SetTransitionDuration(
     base::TimeDelta duration) {
   animator_->transition_duration_ = duration;
 }
 
 }  // namespace ui