Reduce views::Border creation verbosity by promoting factory functions

ui/message_center/views/message_list_view.cc

 // Copyright (c) 2015 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 "base/command_line.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "ui/gfx/animation/slide_animation.h"
 #include "ui/message_center/message_center_style.h"
@@ skipping 28 matching lines @@
   layout->SetDefaultFlex(1);
   SetLayoutManager(layout);
 
   // Set the margin to 0 for the layout. BoxLayout assumes the same margin
   // for top and bottom, but the bottom margin here should be smaller
   // because of the shadow of message view. Use an empty border instead
   // to provide this margin.
   gfx::Insets shadow_insets = MessageView::GetShadowInsets();
   set_background(
       views::Background::CreateSolidBackground(kMessageCenterBackgroundColor));
-  SetBorder(views::Border::CreateEmptyBorder(
+  SetBorder(views::CreateEmptyBorder(
       top_down ? 0 : kMarginBetweenItems - shadow_insets.top(),    /* top */
       kMarginBetweenItems - shadow_insets.left(),                  /* left */
       top_down ? kMarginBetweenItems - shadow_insets.bottom() : 0, /* bottom */
       kMarginBetweenItems - shadow_insets.right() /* right */));
   animator_.AddObserver(this);
 }
 
 MessageListView::~MessageListView() {
   animator_.RemoveObserver(this);
 }
@@ skipping 405 matching lines @@
         base::TimeDelta::FromMilliseconds(
             kAnimateClearingNextNotificationDelayMS));
   }
 }
 
 void MessageListView::SetRepositionTargetForTest(const gfx::Rect& target_rect) {
   SetRepositionTarget(target_rect);
 }
 
 }  // namespace message_center