[cc] Change semantics of fixed-pos container layer

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 72488d864a5301167999c35972413c14ba6d222a..02e0e90fc7f484024c417116dfacc81b69deba80 100644
--- a/cc/trees/layer_tree_host_common_unittest.cc
+++ b/cc/trees/layer_tree_host_common_unittest.cc
@@ -8020,7 +8020,7 @@ TEST_F(LayerTreeHostCommonTest, ScrollSnappingWithFixedPosChild) {
   scoped_refptr<Layer> scroller = Layer::Create();
   scoped_refptr<Layer> fixed_pos = Layer::Create();
 
-  scroller->SetIsContainerForFixedPositionLayers(true);
+  container->SetIsContainerForFixedPositionLayers(true);
 
   root->AddChild(container);
   container->AddChild(scroller);
@@ -8898,8 +8898,8 @@ TEST_F(LayerTreeHostCommonTest, NodesAffectedByViewportBoundsDeltaGetUpdated) {
   outer_viewport_scroll_layer->SetScrollClipLayerId(
       outer_viewport_container_layer->id());
 
-  inner_viewport_scroll_layer->SetIsContainerForFixedPositionLayers(true);
-  outer_viewport_scroll_layer->SetIsContainerForFixedPositionLayers(true);
+  inner_viewport_container_layer->SetIsContainerForFixedPositionLayers(true);
+  outer_viewport_container_layer->SetIsContainerForFixedPositionLayers(true);
 
   host()->SetRootLayer(root);
   host()->RegisterViewportLayers(nullptr, root, inner_viewport_scroll_layer,