Reduce views::Border creation verbosity by promoting factory functions

ash/common/system/tray/system_tray_bubble.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/system/tray/system_tray_bubble.h"
 
 #include <utility>
 #include <vector>
 
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 332 matching lines @@
     }
   }
 
   if (!MaterialDesignController::IsSystemTrayMenuMaterial()) {
     // For default view, draw bottom border for each item, except the last
     // 2 items, which are the bottom header row and the one just above it.
     if (is_default_bubble) {
       const int last_item_with_border =
           static_cast<int>(item_containers.size()) - 2;
       for (int i = 0; i < last_item_with_border; ++i) {
-        item_containers.at(i)->SetBorder(views::Border::CreateSolidSidedBorder(
-            0, 0, 1, 0, kBorderLightColor));
+        item_containers.at(i)->SetBorder(
+            views::CreateSolidSidedBorder(0, 0, 1, 0, kBorderLightColor));
       }
     }
   }
 
   if (focus_view) {
     tray_->ActivateBubble();
     focus_view->RequestFocus();
   }
 }
 
 }  // namespace ash