Send takeover msg from MT to CC using the animation path.

cc/animation/animation_host.h

 // Copyright 2015 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 CC_ANIMATION_ANIMATION_HOST_H_
 #define CC_ANIMATION_ANIMATION_HOST_H_
 
 #include <memory>
 #include <unordered_map>
 
@@ skipping 91 matching lines @@
   bool HasPotentiallyRunningFilterAnimation(ElementId element_id,
                                             ElementListType list_type) const;
   bool HasPotentiallyRunningOpacityAnimation(ElementId element_id,
                                              ElementListType list_type) const;
   bool HasPotentiallyRunningTransformAnimation(ElementId element_id,
                                                ElementListType list_type) const;
 
   bool HasAnyAnimationTargetingProperty(ElementId element_id,
                                         TargetProperty::Type property) const;
 
-  bool ScrollOffsetIsAnimatingOnImplOnly(ElementId element_id) const;
-
   bool HasFilterAnimationThatInflatesBounds(ElementId element_id) const;
   bool HasTransformAnimationThatInflatesBounds(ElementId element_id) const;
   bool HasAnimationThatInflatesBounds(ElementId element_id) const;
 
   bool FilterAnimationBoundsForBox(ElementId element_id,
                                    const gfx::BoxF& box,
                                    gfx::BoxF* bounds) const;
   bool TransformAnimationBoundsForBox(ElementId element_id,
                                       const gfx::BoxF& box,
                                       gfx::BoxF* bounds) const;
@@ skipping 73 matching lines @@
 
   bool supports_scroll_animations_;
   bool animation_waiting_for_deletion_;
 
   DISALLOW_COPY_AND_ASSIGN(AnimationHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_ANIMATION_HOST_H_