cc: Put to_target and to_screen behind an accessor.

third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.cpp

 // Copyright 2015 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 "platform/graphics/compositing/PaintArtifactCompositor.h"
 
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/picture_layer.h"
 #include "cc/playback/display_item_list.h"
@@ skipping 254 matching lines @@
 // Creates a minimal set of property trees for the compositor.
 void setMinimalPropertyTrees(cc::PropertyTrees* propertyTrees, int ownerId)
 {
     // cc's property trees expect a child of the actual root to be used. So we
     // need to create and populate an additional node for each type of tree.
 
     cc::TransformTree& transformTree = propertyTrees->transform_tree;
     if (transformTree.size() < 2) {
         transformTree.Insert(cc::TransformNode(), kRealRootNodeId);
         cc::TransformNode& transformNode = *transformTree.back();
-        transformNode.data.target_id = kRealRootNodeId;
-        transformNode.data.content_target_id = kSecondaryRootNodeId;
+        transformTree.SetTargetId(transformNode.id, kRealRootNodeId);
+        transformTree.SetContentTargetId(transformNode.id, kSecondaryRootNodeId);
         transformNode.data.source_node_id = kRealRootNodeId;
         transformNode.data.needs_local_transform_update = true;
         transformNode.owner_id = ownerId;
         transformTree.set_needs_update(true);
     }
     DCHECK_EQ(transformTree.size(), 2u);
 
     cc::ClipTree& clipTree = propertyTrees->clip_tree;
     if (clipTree.size() < 2) {
         clipTree.Insert(cc::ClipNode(), kRealRootNodeId);
@@ skipping 133 matching lines @@
     layer->SetTransform(transform);
     layer->SetIsDrawable(true);
     layer->SetDoubleSided(!paintChunk.properties.backfaceHidden);
     if (paintChunk.knownToBeOpaque)
         layer->SetContentsOpaque(true);
     m_contentLayerClients.append(std::move(contentLayerClient));
     return layer;
 }
 
 } // namespace blink