Replacing raw pointer to LayerAnimator with scoped_refptr in ScopedLayerAnimationSettings.

ui/compositor/scoped_layer_animation_settings.h

Index: ui/compositor/scoped_layer_animation_settings.h
diff --git a/ui/compositor/scoped_layer_animation_settings.h b/ui/compositor/scoped_layer_animation_settings.h
index e8a1b468ba6f94df2fb1baf1dbfd93704756c40b..e201024c5d22c3939e2934680da3b0dea153220a 100644
--- a/ui/compositor/scoped_layer_animation_settings.h
+++ b/ui/compositor/scoped_layer_animation_settings.h
@@ -26,7 +26,7 @@ class InvertingObserver;
 // (200ms).
 class COMPOSITOR_EXPORT ScopedLayerAnimationSettings {
  public:
-  explicit ScopedLayerAnimationSettings(LayerAnimator* animator);
+  explicit ScopedLayerAnimationSettings(scoped_refptr<LayerAnimator> animator);
   virtual ~ScopedLayerAnimationSettings();
 
   void AddObserver(ImplicitAnimationObserver* observer);
@@ -55,7 +55,7 @@ class COMPOSITOR_EXPORT ScopedLayerAnimationSettings {
   void AddInverselyAnimatedLayer(Layer* inverse_layer);
 
  private:
-  LayerAnimator* animator_;
+  scoped_refptr<LayerAnimator> animator_;
   bool old_is_transition_duration_locked_;
   base::TimeDelta old_transition_duration_;
   gfx::Tween::Type old_tween_type_;