cc: Remove usage of Layer draw_transform

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 1818 matching lines @@
   SetNeedsPushProperties();
 }
 
 int Layer::num_copy_requests_in_target_subtree() {
   return layer_tree_host()
       ->property_trees()
       ->effect_tree.Node(effect_tree_index())
       ->data.num_copy_requests_in_subtree;
 }
 
-gfx::Transform Layer::draw_transform() const {
-  DCHECK_NE(transform_tree_index_, -1);
-  return draw_property_utils::DrawTransform(
-      this, layer_tree_host_->property_trees()->transform_tree);
-}
-
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, -1);
   return draw_property_utils::ScreenSpaceTransform(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc