Move DisplayList to display; add ScreenBase.

ui/display/display_list_unittest.cc

Index: ui/display/display_list_unittest.cc
diff --git a/ui/views/mus/display_list_unittest.cc b/ui/display/display_list_unittest.cc
similarity index 97%
rename from ui/views/mus/display_list_unittest.cc
rename to ui/display/display_list_unittest.cc
index 93cdc81e608b0e8d46f78eea2be6cd9a74f01f96..9873450bc0ad6fd06728f18047422ec3235e613d 100644
--- a/ui/views/mus/display_list_unittest.cc
+++ b/ui/display/display_list_unittest.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/views/mus/display_list.h"
+#include "ui/display/display_list.h"
 
 #include <string>
 #include <vector>
@@ -14,7 +14,7 @@
 
 using display::Display;
 
-namespace views {
+namespace display {
 namespace {
 
 class DisplayObserverImpl : public display::DisplayObserver {
@@ -110,4 +110,4 @@ TEST(DisplayListTest, AddUpdateRemove) {
 }
 
 }  // namespace
-}  // namespace views
+}  // namespace display