Reduce views::Border creation verbosity by promoting factory functions

ash/common/wm/overview/window_selector.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/wm/overview/window_selector.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <utility>
@@ skipping 185 matching lines @@
                bundle.GetFontList(kTextFilterFontStyle).GetHeight());
   DCHECK(text_height);
   const int vertical_padding = (params.bounds.height() - text_height) / 2;
   views::BoxLayout* layout = new views::BoxLayout(
       views::BoxLayout::kHorizontal, kTextFilterHorizontalPadding,
       vertical_padding, kTextFilterHorizontalPadding);
   container->SetLayoutManager(layout);
 
   views::Textfield* textfield = new views::Textfield;
   textfield->set_controller(controller);
-  textfield->SetBorder(views::Border::NullBorder());
+  textfield->SetBorder(views::NullBorder());
   textfield->SetBackgroundColor(kTextFilterBackgroundColor);
   textfield->SetTextColor(kTextFilterTextColor);
   views::ImageView* image_view = new views::ImageView;
   image_view->SetImage(image);
   container->AddChildView(image_view);
   textfield->SetFontList(bundle.GetFontList(kTextFilterFontStyle));
   container->AddChildView(textfield);
   layout->SetFlexForView(textfield, 1);
   widget->SetContentsView(container);
 
@@ skipping 459 matching lines @@
   for (size_t i = 0; i <= grid_list_.size() &&
                      grid_list_[selected_grid_index_]->Move(direction, animate);
        i++) {
     selected_grid_index_ =
         (selected_grid_index_ + display_direction + grid_list_.size()) %
         grid_list_.size();
   }
 }
 
 }  // namespace ash