Change single-display screens to use ScreenBase and DisplayList.

ui/views/mus/window_manager_connection_unittest.cc

Index: ui/views/mus/window_manager_connection_unittest.cc
diff --git a/ui/views/mus/window_manager_connection_unittest.cc b/ui/views/mus/window_manager_connection_unittest.cc
index 299cb7c0cd84824e9dd35da929fd98310d28406b..b3f28d1d21f1d861efd583f5e85fe44e81e62ba2 100644
--- a/ui/views/mus/window_manager_connection_unittest.cc
+++ b/ui/views/mus/window_manager_connection_unittest.cc
@@ -90,8 +90,10 @@ TEST_F(WindowManagerConnectionTest, GetWindowAtScreenPointDisplayOffset) {
 
   // Make the first display offset by 50.
   test::WindowManagerConnectionTestApi api(connection());
-  api.screen()->display_list()->FindDisplayById(displays[0].id())->
-      set_bounds(gfx::Rect(44, 44, 50, 50));
+  display::Display display(
+      *api.screen()->display_list().FindDisplayById(displays[0].id()));
+  display.set_bounds(gfx::Rect(44, 44, 50, 50));
+  api.screen()->display_list().UpdateDisplay(display);
 
   EXPECT_EQ(one, GetWindowAtScreenPoint(gfx::Point(50, 50)));
 }