Reduce views::Border creation verbosity by promoting factory functions

ash/common/system/chromeos/brightness/tray_brightness.cc

 // Copyright 2013 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/chromeos/brightness/tray_brightness.h"
 
 #include <algorithm>
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 99 matching lines @@
     icon->SetImage(
         gfx::CreateVectorIcon(kSystemMenuBrightnessIcon, kMenuIconColor));
   } else {
     icon->SetImage(
         rb.GetImageNamed(IDR_AURA_UBER_TRAY_BRIGHTNESS).ToImageSkia());
   }
   AddChildView(icon);
   slider_ = views::Slider::CreateSlider(
       ash::MaterialDesignController::IsSystemTrayMenuMaterial(), this);
   if (ash::MaterialDesignController::IsSystemTrayMenuMaterial()) {
-    slider_->SetBorder(views::Border::CreateEmptyBorder(
+    slider_->SetBorder(views::CreateEmptyBorder(
         gfx::Insets(0, kTrayPopupSliderPaddingMD) + slider_->GetInsets()));
   }
   slider_->set_focus_border_color(kFocusBorderColor);
   slider_->SetValue(static_cast<float>(initial_percent / 100.0));
   slider_->SetAccessibleName(
       rb.GetLocalizedString(IDS_ASH_STATUS_TRAY_BRIGHTNESS));
   AddChildView(slider_);
 
   if (MaterialDesignController::IsSystemTrayMenuMaterial()) {
     SetVisible(true);
@@ skipping 160 matching lines @@
   if (!display::Display::HasInternalDisplay())
     return;
 
   if (brightness_view_)
     SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
   else
     PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
 }
 
 }  // namespace ash