Reduce views::Border creation verbosity by promoting factory functions

ash/common/system/chromeos/audio/audio_detailed_view.cc

 // Copyright 2014 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/audio/audio_detailed_view.h"
 
 #include "ash/common/system/tray/fixed_sized_scroll_view.h"
 #include "ash/common/system/tray/hover_highlight_view.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 61 matching lines @@
   //  Align info item with checkbox items
   int margin =
       kTrayPopupPaddingHorizontal + kTrayPopupDetailsLabelExtraLeftMargin;
   int left_margin = 0;
   int right_margin = 0;
   if (base::i18n::IsRTL())
     right_margin = margin;
   else
     left_margin = margin;
 
-  label->SetBorder(views::Border::CreateEmptyBorder(
+  label->SetBorder(views::CreateEmptyBorder(
       ash::kTrayPopupPaddingBetweenItems, left_margin,
       ash::kTrayPopupPaddingBetweenItems, right_margin));
   label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   label->SetEnabledColor(SkColorSetARGB(192, 0, 0, 0));
 
   scroll_content()->AddChildView(label);
 }
 
 HoverHighlightView* AudioDetailedView::AddScrollListItem(
     const base::string16& text,
@@ skipping 61 matching lines @@
   AudioDeviceMap::iterator iter = device_map_.find(view);
   if (iter == device_map_.end())
     return;
   chromeos::AudioDevice device = iter->second;
   CrasAudioHandler::Get()->SwitchToDevice(device, true,
                                           CrasAudioHandler::ACTIVATE_BY_USER);
 }
 
 }  // namespace tray
 }  // namespace ash