cc: Clean up transform tree

cc/trees/property_tree_builder.cc

 // Copyright 2014 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/trees/property_tree_builder.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <set>
@@ skipping 623 matching lines @@
 
   float post_local_scale_factor = 1.0f;
 
   if (is_page_scale_layer) {
     if (!is_root)
       post_local_scale_factor *= data_from_ancestor.page_scale_factor;
     data_for_children->property_trees->transform_tree.set_page_scale_factor(
         data_from_ancestor.page_scale_factor);
   }
 
-  if (has_surface && !is_root)
-    node->needs_surface_contents_scale = true;
-
   node->source_node_id = source_index;
   node->post_local_scale_factor = post_local_scale_factor;
   if (is_root) {
     float page_scale_factor_for_root =
         is_page_scale_layer ? data_from_ancestor.page_scale_factor : 1.f;
     data_for_children->property_trees->transform_tree
         .SetRootTransformsAndScales(data_for_children->property_trees
                                         ->transform_tree.device_scale_factor(),
                                     page_scale_factor_for_root,
                                     *data_from_ancestor.device_transform,
@@ skipping 829 matching lines @@
     color = SkColorSetA(color, 255);
   BuildPropertyTreesTopLevelInternal(
       root_layer, page_scale_layer, inner_viewport_scroll_layer,
       outer_viewport_scroll_layer, overscroll_elasticity_layer,
       elastic_overscroll, page_scale_factor, device_scale_factor, viewport,
       device_transform, property_trees, color);
   property_trees->ResetCachedData();
 }
 
 }  // namespace cc