Move DisplayList to display; add ScreenBase.

ash/display/unified_mouse_warp_controller.cc

Index: ash/display/unified_mouse_warp_controller.cc
diff --git a/ash/display/unified_mouse_warp_controller.cc b/ash/display/unified_mouse_warp_controller.cc
index d2c7c4930fa224f7653dfcabc9c44c921f08c4d1..224ef5ad24ccacfbcbed1af4fbc38c42c8679ec8 100644
--- a/ash/display/unified_mouse_warp_controller.cc
+++ b/ash/display/unified_mouse_warp_controller.cc
@@ -39,7 +39,7 @@ AshWindowTreeHost* GetMirroringAshWindowTreeHostForDisplayId(
 // the |point_in_screen|. Returns nullptr if such WTH does not exist.
 aura::WindowTreeHost* FindMirroringWindowTreeHostFromScreenPoint(
     const gfx::Point& point_in_screen) {
-  display::DisplayList mirroring_display_list =
+  display::Displays mirroring_display_list =
       Shell::GetInstance()
           ->display_manager()
           ->software_mirroring_display_list();
@@ -78,7 +78,7 @@ bool UnifiedMouseWarpController::WarpMouseCursor(ui::MouseEvent* event) {
     aura::client::CursorClient* cursor_client =
         aura::client::GetCursorClient(target->GetRootWindow());
     if (cursor_client) {
-      display::DisplayList mirroring_display_list =
+      display::Displays mirroring_display_list =
           Shell::GetInstance()
               ->display_manager()
               ->software_mirroring_display_list();
@@ -122,9 +122,9 @@ void UnifiedMouseWarpController::SetEnabled(bool enabled) {
 }
 
 void UnifiedMouseWarpController::ComputeBounds() {
-  display::DisplayList display_list = Shell::GetInstance()
-                                          ->display_manager()
-                                          ->software_mirroring_display_list();
+  display::Displays display_list = Shell::GetInstance()
+                                       ->display_manager()
+                                       ->software_mirroring_display_list();
 
   if (display_list.size() < 2) {
     LOG(ERROR) << "Mirroring Display lost during re-configuration";
@@ -156,9 +156,9 @@ bool UnifiedMouseWarpController::WarpMouseCursorInNativeCoords(
   bool in_second_edge = second_edge_bounds_in_native_.Contains(point_in_native);
   if (!in_first_edge && !in_second_edge)
     return false;
-  display::DisplayList display_list = Shell::GetInstance()
-                                          ->display_manager()
-                                          ->software_mirroring_display_list();
+  display::Displays display_list = Shell::GetInstance()
+                                       ->display_manager()
+                                       ->software_mirroring_display_list();
   // Wait updating the cursor until the cursor moves to the new display
   // to avoid showing the wrong sized cursor at the source display.
   current_cursor_display_id_ =