cc: Move LayerImpl::AddChild and RemoveChild to LayerImplTestProperties

cc/layers/layer_iterator_unittest.cc

Index: cc/layers/layer_iterator_unittest.cc
diff --git a/cc/layers/layer_iterator_unittest.cc b/cc/layers/layer_iterator_unittest.cc
index 3e8cb0990d5ba4f4ff2b263325663f28c0b48a14..07adda82b429dac7e0cab8925d934ec5a066a294 100644
--- a/cc/layers/layer_iterator_unittest.cc
+++ b/cc/layers/layer_iterator_unittest.cc
@@ -131,10 +131,10 @@ TEST_F(LayerIteratorTest, SimpleTree) {
   TestLayerImpl* third_ptr = third.get();
   TestLayerImpl* fourth_ptr = fourth.get();
 
-  root_layer->AddChild(std::move(first));
-  root_layer->AddChild(std::move(second));
-  root_layer->AddChild(std::move(third));
-  root_layer->AddChild(std::move(fourth));
+  root_layer->test_properties()->AddChild(std::move(first));
+  root_layer->test_properties()->AddChild(std::move(second));
+  root_layer->test_properties()->AddChild(std::move(third));
+  root_layer->test_properties()->AddChild(std::move(fourth));
 
   host_impl_.active_tree()->SetRootLayer(std::move(root_layer));
 
@@ -172,14 +172,14 @@ TEST_F(LayerIteratorTest, ComplexTree) {
   TestLayerImpl* root221_ptr = root221.get();
   TestLayerImpl* root231_ptr = root231.get();
 
-  root22->AddChild(std::move(root221));
-  root23->AddChild(std::move(root231));
-  root2->AddChild(std::move(root21));
-  root2->AddChild(std::move(root22));
-  root2->AddChild(std::move(root23));
-  root_layer->AddChild(std::move(root1));
-  root_layer->AddChild(std::move(root2));
-  root_layer->AddChild(std::move(root3));
+  root22->test_properties()->AddChild(std::move(root221));
+  root23->test_properties()->AddChild(std::move(root231));
+  root2->test_properties()->AddChild(std::move(root21));
+  root2->test_properties()->AddChild(std::move(root22));
+  root2->test_properties()->AddChild(std::move(root23));
+  root_layer->test_properties()->AddChild(std::move(root1));
+  root_layer->test_properties()->AddChild(std::move(root2));
+  root_layer->test_properties()->AddChild(std::move(root3));
 
   host_impl_.active_tree()->SetRootLayer(std::move(root_layer));
 
@@ -224,15 +224,15 @@ TEST_F(LayerIteratorTest, ComplexTreeMultiSurface) {
   root22->test_properties()->force_render_surface = true;
   root23->test_properties()->force_render_surface = true;
   root2->test_properties()->force_render_surface = true;
-  root22->AddChild(std::move(root221));
-  root23->AddChild(std::move(root231));
+  root22->test_properties()->AddChild(std::move(root221));
+  root23->test_properties()->AddChild(std::move(root231));
   root2->SetDrawsContent(false);
-  root2->AddChild(std::move(root21));
-  root2->AddChild(std::move(root22));
-  root2->AddChild(std::move(root23));
-  root_layer->AddChild(std::move(root1));
-  root_layer->AddChild(std::move(root2));
-  root_layer->AddChild(std::move(root3));
+  root2->test_properties()->AddChild(std::move(root21));
+  root2->test_properties()->AddChild(std::move(root22));
+  root2->test_properties()->AddChild(std::move(root23));
+  root_layer->test_properties()->AddChild(std::move(root1));
+  root_layer->test_properties()->AddChild(std::move(root2));
+  root_layer->test_properties()->AddChild(std::move(root3));
 
   host_impl_.active_tree()->SetRootLayer(std::move(root_layer));