Reduce views::Border creation verbosity by promoting factory functions

ui/arc/notification/arc_custom_notification_view.cc

Index: ui/arc/notification/arc_custom_notification_view.cc
diff --git a/ui/arc/notification/arc_custom_notification_view.cc b/ui/arc/notification/arc_custom_notification_view.cc
index b1588fce5c6ee8e970e22a2e9238ae6c64e4694c..58dd6bfda5180f92f882f9bdc37769181799df14 100644
--- a/ui/arc/notification/arc_custom_notification_view.cc
+++ b/ui/arc/notification/arc_custom_notification_view.cc
@@ -187,9 +187,9 @@ void ArcCustomNotificationView::CreateFloatingCloseButton() {
   constexpr int kImageSize = 16;
   constexpr int kTouchExtendedPadding =
       message_center::kControlButtonSize - kImageSize - kPaddingFromBorder;
-  floating_close_button_->SetBorder(views::Border::CreateEmptyBorder(
-      kPaddingFromBorder, kTouchExtendedPadding, kTouchExtendedPadding,
-      kPaddingFromBorder));
+  floating_close_button_->SetBorder(
+      views::CreateEmptyBorder(kPaddingFromBorder, kTouchExtendedPadding,
+                               kTouchExtendedPadding, kPaddingFromBorder));
 
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   floating_close_button_->SetImage(