Reduce views::Border creation verbosity by promoting factory functions

ui/app_list/views/search_box_view.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 "ui/app_list/views/search_box_view.h"
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 125 matching lines @@
   content_container_->set_background(new SearchBoxBackground());
 
   views::BoxLayout* layout =
       new views::BoxLayout(views::BoxLayout::kHorizontal, kPadding, 0,
                            kInnerPadding - views::Textfield::kTextPadding);
   content_container_->SetLayoutManager(layout);
   layout->set_cross_axis_alignment(
       views::BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
   layout->set_minimum_cross_axis_size(kPreferredHeight);
 
-  search_box_->SetBorder(views::Border::NullBorder());
+  search_box_->SetBorder(views::NullBorder());
   search_box_->SetTextColor(kSearchTextColor);
   search_box_->SetBackgroundColor(kSearchBoxBackground);
   search_box_->set_placeholder_text_color(kHintTextColor);
   search_box_->set_controller(this);
   search_box_->SetTextInputType(ui::TEXT_INPUT_TYPE_SEARCH);
   search_box_->SetTextInputFlags(ui::TEXT_INPUT_FLAG_AUTOCORRECT_OFF);
   content_container_->AddChildView(search_box_);
   layout->SetFlexForView(search_box_, 1);
 
   view_delegate_->GetSpeechUI()->AddObserver(this);
@@ skipping 270 matching lines @@
   NotifyQueryChanged();
 }
 
 void SearchBoxView::OnSpeechRecognitionStateChanged(
     SpeechRecognitionState new_state) {
   SpeechRecognitionButtonPropChanged();
   SchedulePaint();
 }
 
 }  // namespace app_list