UI Compositor Animation: Remove cc::ElementAnimations state storage.

ui/compositor/layer_animator.h

 // 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.
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATOR_H_
 #define UI_COMPOSITOR_LAYER_ANIMATOR_H_
 
 #include <deque>
 #include <vector>
 
@@ skipping 99 matching lines @@
   // Sets the layer animation delegate the animator is associated with. The
   // animator does not own the delegate. The layer animator expects a non-NULL
   // delegate for most of its operations, so do not call any methods without
   // a valid delegate installed.
   void SetDelegate(LayerAnimationDelegate* delegate);
 
   // Unsubscribe from |cc_layer_| and subscribe to |new_layer|.
   void SwitchToLayer(scoped_refptr<cc::Layer> new_layer);
 
   // Attach AnimationPlayer to Layer and AnimationTimeline
-  void SetCompositor(Compositor* compositor);
+  void AttachLayerAndTimeline(Compositor* compositor);
   // Detach AnimationPlayer from Layer and AnimationTimeline
-  void ResetCompositor(Compositor* compositor);
+  void DetachLayerAndTimeline(Compositor* compositor);
 
   cc::AnimationPlayer* GetAnimationPlayerForTesting() const;
 
   // Sets the animation preemption strategy. This determines the behaviour if
   // a property is set during an animation. The default is
   // IMMEDIATELY_SET_NEW_TARGET (see ImmediatelySetNewTarget below).
   void set_preemption_strategy(PreemptionStrategy strategy) {
     preemption_strategy_ = strategy;
   }
 
@@ skipping 266 matching lines @@
   bool disable_timer_for_test_;
 
   // Prevents timer adjustments in case when we start multiple animations
   // with preemption strategies that discard previous animations.
   bool adding_animations_;
 
   // Observers are notified when layer animations end, are scheduled or are
   // aborted.
   base::ObserverList<LayerAnimationObserver> observers_;
 
-  // We store a state of ElementAnimations here to save it in
-  // ResetCompositor/SetCompositor scope.
-  // TODO(loyso): Remove it. crbug.com/592873.
-  scoped_refptr<cc::ElementAnimations> element_animations_state_;
-
   DISALLOW_COPY_AND_ASSIGN(LayerAnimator);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_ANIMATOR_H_