Remove Layer/LayerImpl's FixedContainerSizeDelta

cc/layers/layer_impl.cc

 // Copyright 2012 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_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 358 matching lines @@
   update_rect_ = gfx::Rect();
   layer_tree_impl()->RemoveLayerShouldPushProperties(this);
 }
 
 bool LayerImpl::IsAffectedByPageScale() const {
   TransformTree& transform_tree = GetTransformTree();
   return transform_tree.Node(transform_tree_index())
       ->in_subtree_of_page_scale_layer;
 }
 
-gfx::Vector2dF LayerImpl::FixedContainerSizeDelta() const {
-  LayerImpl* scroll_clip_layer =
-      layer_tree_impl()->LayerById(scroll_clip_layer_id_);
-  if (!scroll_clip_layer)
-    return gfx::Vector2dF();
-
-  return scroll_clip_layer->ViewportBoundsDelta();
-}
-
 std::unique_ptr<base::DictionaryValue> LayerImpl::LayerTreeAsJson() {
   std::unique_ptr<base::DictionaryValue> result(new base::DictionaryValue);
   result->SetInteger("LayerId", id());
   result->SetString("LayerType", LayerTypeAsString());
 
   auto list = base::MakeUnique<base::ListValue>();
   list->AppendInteger(bounds().width());
   list->AppendInteger(bounds().height());
   result->Set("Bounds", std::move(list));
 
@@ skipping 590 matching lines @@
 
 ScrollTree& LayerImpl::GetScrollTree() const {
   return GetPropertyTrees()->scroll_tree;
 }
 
 TransformTree& LayerImpl::GetTransformTree() const {
   return GetPropertyTrees()->transform_tree;
 }
 
 }  // namespace cc