Share animations from compositor to main thread.

cc/animation/animation_registrar.cc

Index: cc/animation/animation_registrar.cc
diff --git a/cc/animation/animation_registrar.cc b/cc/animation/animation_registrar.cc
index e5ecf838296ff51071278de068e241a4b6d0a3ac..e498045b56d4d2f3485f5a4b95ee63e93978d0fa 100644
--- a/cc/animation/animation_registrar.cc
+++ b/cc/animation/animation_registrar.cc
@@ -132,6 +132,10 @@ void AnimationRegistrar::SetAnimationEvents(
           (*iter).second->NotifyAnimationPropertyUpdate(
               events->events_[event_index]);
           break;
+
+        case AnimationEvent::TAKEOVER:
+          (*iter).second->NotifyAnimationTakeover(events->events_[event_index]);
+          break;
       }
     }
   }