NOT FOR REVIEW - convert to cc animation

cc/animation/element_animations.h

Index: cc/animation/element_animations.h
diff --git a/cc/animation/element_animations.h b/cc/animation/element_animations.h
index 81ce7aff03d267e20a7eee21a1908d846d8e6b3a..eba818a074e9b0945d5c903dbff2af74a5255b31 100644
--- a/cc/animation/element_animations.h
+++ b/cc/animation/element_animations.h
@@ -12,10 +12,10 @@
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "cc/animation/animation_export.h"
+#include "cc/animation/animation_observer.h"
 #include "cc/trees/element_id.h"
 #include "cc/trees/property_animation_state.h"
 #include "cc/trees/target_property.h"
-#include "ui/gfx/geometry/scroll_offset.h"
 #include "ui/gfx/transform.h"
 
 namespace gfx {
@@ -37,7 +37,8 @@ enum class UpdateTickingType { NORMAL, FORCE };
 // This is a CC counterpart for blink::ElementAnimations (in 1:1 relationship).
 // No pointer to/from respective blink::ElementAnimations object for now.
 class CC_ANIMATION_EXPORT ElementAnimations
-    : public base::RefCounted<ElementAnimations> {
+    : public base::RefCounted<ElementAnimations>,
+      public AnimationObserver {
  public:
   static scoped_refptr<ElementAnimations> Create();
 
@@ -145,25 +146,28 @@ class CC_ANIMATION_EXPORT ElementAnimations
   void UpdateClientAnimationState();
   void SetNeedsUpdateImplClientState();
 
+  // AnimationObserver
   void NotifyClientOpacityAnimated(float opacity,
                                    bool notify_active_elements,
-                                   bool notify_pending_elements);
-  void NotifyClientTransformAnimated(const gfx::Transform& transform,
-                                     bool notify_active_elements,
-                                     bool notify_pending_elements);
+                                   bool notify_pending_elements) override;
+  void NotifyClientTransformOperationsAnimated(
+      const TransformOperations& operations,
+      bool notify_active_elements,
+      bool notify_pending_elements) override;
   void NotifyClientFilterAnimated(const FilterOperations& filter,
                                   bool notify_active_elements,
-                                  bool notify_pending_elements);
+                                  bool notify_pending_elements) override;
   void NotifyClientScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset,
                                         bool notify_active_elements,
-                                        bool notify_pending_elements);
+                                        bool notify_pending_elements) override;
+
   gfx::ScrollOffset ScrollOffsetForAnimation() const;
 
  private:
   friend class base::RefCounted<ElementAnimations>;
 
   ElementAnimations();
-  ~ElementAnimations();
+  ~ElementAnimations() override;
 
   void OnFilterAnimated(ElementListType list_type,
                         const FilterOperations& filters);