Remove Layer{Impl}::FilterIsAnimating.

cc/layers/layer.cc

 // Copyright 2010 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.
 
 #include "cc/layers/layer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1283 matching lines @@
     return;
   may_contain_video_ = yes;
   SetNeedsPushProperties();
 }
 
 void Layer::SetScrollbarsHiddenFromImplSide(bool hidden) {
   if (inputs_.client)
     inputs_.client->didChangeScrollbarsHidden(hidden);
 }
 
-bool Layer::FilterIsAnimating() const {
-  return GetMutatorHost()->IsAnimatingFilterProperty(
-      element_id(), GetElementTypeForAnimation());
-}
-
 bool Layer::TransformIsAnimating() const {
   return GetMutatorHost()->IsAnimatingTransformProperty(
       element_id(), GetElementTypeForAnimation());
 }
 
 gfx::ScrollOffset Layer::ScrollOffsetForAnimation() const {
   return CurrentScrollOffset();
 }
 
 // On<Property>Animated is called due to an ongoing accelerated animation.
@@ skipping 117 matching lines @@
       ->subtree_has_copy_request;
 }
 
 gfx::Transform Layer::ScreenSpaceTransform() const {
   DCHECK_NE(transform_tree_index_, TransformTree::kInvalidNodeId);
   return draw_property_utils::ScreenSpaceTransform(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc