ui::Layer::SwitchToLayer should finish animations on its old cc::Layer

ui/compositor/layer.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_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 298 matching lines @@
   bool force_render_surface() const { return force_render_surface_; }
 
   // LayerAnimationEventObserver
   virtual void OnAnimationStarted(const cc::AnimationEvent& event) OVERRIDE;
 
   // Whether this layer has animations waiting to get sent to its cc::Layer.
   bool HasPendingThreadedAnimations() {
     return pending_threaded_animations_.size() != 0;
   }
 
+  // Triggers a call to SwitchToLayer.
+  void SwitchCCLayerForTest();
+
  private:
   // Stacks |child| above or below |other|.  Helper method for StackAbove() and
   // StackBelow().
   void StackRelativeTo(Layer* child, Layer* other, bool above);
 
   bool ConvertPointForAncestor(const Layer* ancestor, gfx::Point* point) const;
   bool ConvertPointFromAncestor(const Layer* ancestor, gfx::Point* point) const;
 
   bool GetTargetTransformRelativeTo(const Layer* ancestor,
                                     gfx::Transform* transform) const;
@@ skipping 131 matching lines @@
   // The size of the delegated frame in DIP, set when SetDelegatedFrame was
   // called.
   gfx::Size delegated_frame_size_in_dip_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_