Determine a layer's IsAffectedByPageScale property without using Layer Tree

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 1334 matching lines @@
 
   if (layer->layer_animation_controller() && layer_animation_controller_)
     layer_animation_controller_->PushAnimationUpdatesTo(
         layer->layer_animation_controller());
 
   if (frame_timing_requests_dirty_) {
     layer->SetFrameTimingRequests(frame_timing_requests_);
     frame_timing_requests_dirty_ = false;
   }
 
-  bool is_page_scale_layer = this == layer_tree_host()->page_scale_layer();
-  bool parent_affected =
-      layer->parent() && layer->parent()->IsAffectedByPageScale();
-  layer->SetIsAffectedByPageScale(is_page_scale_layer || parent_affected);
-
   // Reset any state that should be cleared for the next update.
   stacking_order_changed_ = false;
   update_rect_ = gfx::Rect();
 
   needs_push_properties_ = false;
   num_dependents_need_push_properties_ = 0;
 }
 
 void Layer::SetTypeForProtoSerialization(proto::LayerNode* proto) const {
   proto->set_type(proto::LayerType::Base);
@@ skipping 671 matching lines @@
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, -1);
   return ScreenSpaceTransformFromPropertyTrees(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc