[Sketch] CC Animations: Torpedo the old intrusive animation system.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 3661fefac7d0a953e0c387ce22ae57a96a8e7d80..d77cea8506039c36743bf034a4ecf8927698d0d9 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -14,7 +14,6 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "cc/animation/animation_events.h"
-#include "cc/animation/animation_registrar.h"
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/synced_property.h"
@@ -462,9 +461,6 @@ class CC_EXPORT LayerTreeHostImpl
 
   Proxy* proxy() const { return proxy_; }
 
-  AnimationRegistrar* animation_registrar() const {
-    return animation_registrar_.get();
-  }
   AnimationHost* animation_host() const { return animation_host_.get(); }
 
   void SetDebugState(const LayerTreeDebugState& new_debug_state);
@@ -769,7 +765,6 @@ class CC_EXPORT LayerTreeHostImpl
   // Expected time between two begin impl frame calls.
   base::TimeDelta begin_impl_frame_interval_;
 
-  scoped_ptr<AnimationRegistrar> animation_registrar_;
   scoped_ptr<AnimationHost> animation_host_;
   std::set<ScrollbarAnimationController*> scrollbar_animation_controllers_;
   std::set<VideoFrameController*> video_frame_controllers_;