cc: Move data to LayerTree from LayerTreeHost.

cc/trees/layer_tree_host_common_unittest.cc

Index: cc/trees/layer_tree_host_common_unittest.cc
diff --git a/cc/trees/layer_tree_host_common_unittest.cc b/cc/trees/layer_tree_host_common_unittest.cc
index 1953970a32a5a5bf6ed5dcdf40f58ac5efa89e87..bd3bb491ab59bbdcff8cea18da9a8e5ee75889af 100644
--- a/cc/trees/layer_tree_host_common_unittest.cc
+++ b/cc/trees/layer_tree_host_common_unittest.cc
@@ -7697,8 +7697,8 @@ TEST_F(LayerTreeHostCommonTest, NodesAffectedByBoundsDeltaGetUpdated) {
   outer_viewport_scroll_layer->SetIsContainerForFixedPositionLayers(true);
 
   host()->SetRootLayer(root);
-  host()->RegisterViewportLayers(nullptr, root, inner_viewport_scroll_layer,
-                                 outer_viewport_scroll_layer);
+  host()->GetLayerTree()->RegisterViewportLayers(
+      nullptr, root, inner_viewport_scroll_layer, outer_viewport_scroll_layer);
 
   scoped_refptr<Layer> fixed_to_inner = Layer::Create();
   scoped_refptr<Layer> fixed_to_outer = Layer::Create();
@@ -9492,7 +9492,8 @@ TEST_F(LayerTreeHostCommonTest, ScrollTreeBuilderTest) {
   parent5->SetNonFastScrollableRegion(gfx::Rect(0, 0, 50, 50));
   parent5->SetBounds(gfx::Size(10, 10));
 
-  host()->RegisterViewportLayers(nullptr, page_scale_layer, parent2, nullptr);
+  host()->GetLayerTree()->RegisterViewportLayers(nullptr, page_scale_layer,
+                                                 parent2, nullptr);
   ExecuteCalculateDrawPropertiesWithPropertyTrees(root1.get());
 
   const int kInvalidPropertyTreeNodeId = -1;