Simplify calls for scale factor

ui/views/drag_utils.cc

Index: ui/views/drag_utils.cc
diff --git a/ui/views/drag_utils.cc b/ui/views/drag_utils.cc
index dc068c54fd8a8bae1c8fa35df2a09eedfa01b14f..9c7251fc91f23495045ed748d95b24e29b3d0c1a 100644
--- a/ui/views/drag_utils.cc
+++ b/ui/views/drag_utils.cc
@@ -4,8 +4,7 @@
 
 #include "ui/views/drag_utils.h"
 
-#include "ui/display/display.h"
-#include "ui/display/screen.h"
+#include "ui/base/layout.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/views/widget/widget.h"
@@ -16,9 +15,7 @@ float ScaleFactorForDragFromWidget(Widget* widget) {
   float device_scale = 1.0f;
   if (widget && widget->GetNativeView()) {
     gfx::NativeView view = widget->GetNativeView();
-    display::Display display =
-        display::Screen::GetScreen()->GetDisplayNearestWindow(view);
-    device_scale = display.device_scale_factor();
+    device_scale = ui::GetScaleFactorForNativeView(view);
   }
   return device_scale;
 }