cc : Move LayerImpl::children to test properties

cc/trees/layer_tree_host_common_unittest.cc

 // Copyright 2011 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/layer_tree_host_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 3695 matching lines @@
   child->AddChild(std::move(grand_child));
   root->AddChild(std::move(child));
   root->AddChild(std::move(occluding_child));
   host_impl.active_tree()->SetRootLayer(std::move(root));
   host_impl.SetVisible(true);
   host_impl.InitializeRenderer(output_surface.get());
   host_impl.active_tree()->BuildLayerListAndPropertyTreesForTesting();
   bool update_lcd_text = false;
   host_impl.active_tree()->UpdateDrawProperties(update_lcd_text);
 
-  LayerImpl* grand_child_ptr =
-      host_impl.active_tree()->root_layer()->children()[0]->children()[0];
+  LayerImpl* grand_child_ptr = host_impl.active_tree()
+                                   ->root_layer()
+                                   ->test_properties()
+                                   ->children[0]
+                                   ->test_properties()
+                                   ->children[0];
 
   // Though all layers have invertible transforms, matrix multiplication using
   // floating-point math makes the draw transform uninvertible.
   EXPECT_FALSE(
       host_impl.active_tree()
           ->property_trees()
           ->transform_tree.Node(grand_child_ptr->transform_tree_index())
           ->data.ancestors_are_invertible);
 
   // Since |grand_child| has an uninvertible screen space transform, it is
@@ skipping 4324 matching lines @@
                                gfx::Point3F(),
                                gfx::PointF(),
                                root_size,
                                false,
                                false,
                                true);
   root->SetMasksToBounds(true);
 
   root->AddChild(LayerImpl::Create(host_impl.active_tree(), 2));
 
-  LayerImpl* sublayer = root->child_at(0);
+  LayerImpl* sublayer = root->test_properties()->children[0];
   SetLayerPropertiesForTesting(sublayer,
                                identity_matrix,
                                gfx::Point3F(),
                                gfx::PointF(),
                                sublayer_size,
                                false,
                                false,
                                false);
   sublayer->SetDrawsContent(true);
 
@@ skipping 2203 matching lines @@
   EXPECT_EQ(scroll_child6.id, grand_child10->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent3->scroll_tree_index());
   EXPECT_EQ(scroll_child7.id, child8->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent4->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, child9->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, grand_child12->scroll_tree_index());
 }
 
 }  // namespace
 }  // namespace cc