cc: Put to_target and to_screen behind an accessor.

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 489 matching lines @@
   if (layer == data_from_ancestor.page_scale_layer)
     data_for_children->in_subtree_of_page_scale_layer = true;
   node->data.in_subtree_of_page_scale_layer =
       data_for_children->in_subtree_of_page_scale_layer;
 
   // Surfaces inherently flatten transforms.
   data_for_children->should_flatten =
       ShouldFlattenTransform(layer) || has_surface;
   DCHECK_GT(data_from_ancestor.property_trees->effect_tree.size(), 0u);
 
-  node->data.target_id = data_for_children->property_trees->effect_tree
-                             .Node(data_from_ancestor.render_target)
-                             ->data.transform_id;
-  node->data.content_target_id = data_for_children->property_trees->effect_tree
-                                     .Node(data_for_children->render_target)
-                                     ->data.transform_id;
-  DCHECK_NE(node->data.target_id, kInvalidPropertyTreeNodeId);
+  data_for_children->property_trees->transform_tree.SetTargetId(
+      node->id, data_for_children->property_trees->effect_tree
+                    .Node(data_from_ancestor.render_target)
+                    ->data.transform_id);
+  data_for_children->property_trees->transform_tree.SetContentTargetId(
+      node->id, data_for_children->property_trees->effect_tree
+                    .Node(data_for_children->render_target)
+                    ->data.transform_id);
+  DCHECK_NE(
+      data_for_children->property_trees->transform_tree.TargetId(node->id),
+      kInvalidPropertyTreeNodeId);
 
   node->data.has_potential_animation = has_potentially_animated_transform;
   if (has_potentially_animated_transform) {
     float maximum_animation_target_scale = 0.f;
     if (layer->MaximumTargetScale(&maximum_animation_target_scale)) {
       node->data.local_maximum_animation_target_scale =
           maximum_animation_target_scale;
     }
 
     float starting_animation_scale = 0.f;
@@ skipping 792 matching lines @@
   if (SkColorGetA(color) != 255)
     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);
 }
 
 }  // namespace cc