Reduce views::Border creation verbosity by promoting factory functions

ash/common/system/overview/overview_button_tray.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/overview/overview_button_tray.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/wm_shelf_util.h"
@@ skipping 110 matching lines @@
     const int vertical_padding = (kTrayItemSize - image.height()) / 2;
     const int horizontal_padding = (kTrayItemSize - image.width()) / 2;
     insets = gfx::Insets(vertical_padding, horizontal_padding);
   } else {
     insets = IsHorizontalAlignment(shelf_alignment())
                  ? gfx::Insets(kHorizontalShelfVerticalPadding,
                                kHorizontalShelfHorizontalPadding)
                  : gfx::Insets(kVerticalShelfVerticalPadding,
                                kVerticalShelfHorizontalPadding);
   }
-  icon_->SetBorder(views::Border::CreateEmptyBorder(insets));
+  icon_->SetBorder(views::CreateEmptyBorder(insets));
 }
 
 void OverviewButtonTray::UpdateIconVisibility() {
   // The visibility of the OverviewButtonTray has diverge from
   // WindowSelectorController::CanSelect. The visibility of the button should
   // not change during transient times in which CanSelect is false. Such as when
   // a modal dialog is present.
   WmShell* shell = WmShell::Get();
   SessionStateDelegate* session_state_delegate =
       shell->GetSessionStateDelegate();
 
   SetVisible(
       shell->maximize_mode_controller()->IsMaximizeModeWindowManagerEnabled() &&
       session_state_delegate->IsActiveUserSessionStarted() &&
       !session_state_delegate->IsScreenLocked() &&
       session_state_delegate->GetSessionState() ==
           session_manager::SessionState::ACTIVE &&
       shell->system_tray_delegate()->GetUserLoginStatus() !=
           LoginStatus::KIOSK_APP);
 }
 
 }  // namespace ash