Move DisplayList to display; add ScreenBase.

ui/display/manager/display_manager_utilities.cc

Index: ui/display/manager/display_manager_utilities.cc
diff --git a/ui/display/manager/display_manager_utilities.cc b/ui/display/manager/display_manager_utilities.cc
index ce486a1e5ab42606f75496c9788b8d88237cef7e..7a6b77ddd38fe56dc9814811f075b6202007b6cb 100644
--- a/ui/display/manager/display_manager_utilities.cc
+++ b/ui/display/manager/display_manager_utilities.cc
@@ -263,7 +263,7 @@ int FindDisplayIndexContainingPoint(
   return iter == displays.end() ? -1 : (iter - displays.begin());
 }
 
-display::DisplayIdList CreateDisplayIdList(const display::DisplayList& list) {
+display::DisplayIdList CreateDisplayIdList(const display::Displays& list) {
   return GenerateDisplayIdList(
       list.begin(), list.end(),
       [](const display::Display& display) { return display.id(); });