cc: Move LayerImpl::AddChild and RemoveChild to LayerImplTestProperties

cc/trees/occlusion_tracker_unittest.cc

 // Copyright 2012 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/occlusion_tracker.h"
 
 #include <stddef.h>
 
 #include "cc/base/math_util.h"
 #include "cc/layers/layer.h"
@@ skipping 104 matching lines @@
 
   LayerImpl* CreateLayer(LayerImpl* parent,
                          const gfx::Transform& transform,
                          const gfx::PointF& position,
                          const gfx::Size& bounds) {
     LayerTreeImpl* tree = host_->host_impl()->active_tree();
     int id = next_layer_impl_id_++;
     std::unique_ptr<LayerImpl> layer = LayerImpl::Create(tree, id);
     LayerImpl* layer_ptr = layer.get();
     SetProperties(layer_ptr, transform, position, bounds);
-    parent->AddChild(std::move(layer));
+    parent->test_properties()->AddChild(std::move(layer));
     return layer_ptr;
   }
 
   LayerImpl* CreateSurface(LayerImpl* parent,
                            const gfx::Transform& transform,
                            const gfx::PointF& position,
                            const gfx::Size& bounds) {
     LayerImpl* layer = CreateLayer(parent, transform, position, bounds);
     layer->test_properties()->force_render_surface = true;
     return layer;
@@ skipping 14 matching lines @@
     if (opaque_layers_) {
       layer_ptr->SetContentsOpaque(opaque);
     } else {
       layer_ptr->SetContentsOpaque(false);
       if (opaque)
         layer_ptr->SetOpaqueContentsRect(gfx::Rect(bounds));
       else
         layer_ptr->SetOpaqueContentsRect(gfx::Rect());
     }
 
-    parent->AddChild(std::move(layer));
+    parent->test_properties()->AddChild(std::move(layer));
     return layer_ptr;
   }
 
   LayerImpl* CreateReplicaLayer(LayerImpl* owning_layer,
                                 const gfx::Transform& transform,
                                 const gfx::PointF& position,
                                 const gfx::Size& bounds) {
     LayerTreeImpl* tree = host_->host_impl()->active_tree();
     int id = next_layer_impl_id_++;
     std::unique_ptr<TestContentLayerImpl> layer(
@@ skipping 2343 matching lines @@
     EXPECT_EQ(gfx::Rect(),
               occlusion.UnoccludedSurfaceContentRect(
                   surface, gfx::Rect(80, 70, 50, 50)));
   }
 };
 
 ALL_OCCLUSIONTRACKER_TEST(OcclusionTrackerTestUnoccludedSurfaceQuery)
 
 }  // namespace
 }  // namespace cc