Rename gfx::Display/Screen to display::Display/Screen in ash

ash/display/extended_mouse_warp_controller.h

Index: ash/display/extended_mouse_warp_controller.h
diff --git a/ash/display/extended_mouse_warp_controller.h b/ash/display/extended_mouse_warp_controller.h
index 824f173441602b16c020faa3eb356b522fb6d7c7..933813e314580ea737c909119c75ace338f64de8 100644
--- a/ash/display/extended_mouse_warp_controller.h
+++ b/ash/display/extended_mouse_warp_controller.h
@@ -23,6 +23,10 @@ class Point;
 class Display;
 }
 
+namespace display {
+using Display = gfx::Display;
+}
+
 namespace ash {
 namespace test {
 class DisplayManagerTestApi;
@@ -109,8 +113,8 @@ class ASH_EXPORT ExtendedMouseWarpController : public MouseWarpController {
   // drag is started, or invalid id passed if this is not for
   // dragging. Returns null scoped_ptr if two displays do not share
   // the edge.
-  std::unique_ptr<WarpRegion> CreateWarpRegion(const gfx::Display& a,
-                                               const gfx::Display& b,
+  std::unique_ptr<WarpRegion> CreateWarpRegion(const display::Display& a,
+                                               const display::Display& b,
                                                int64_t drag_source_dispay_id);
 
   void allow_non_native_event_for_test() { allow_non_native_event_ = true; }