Remove non-MD code from TrayBackgroundView

ash/common/system/chromeos/session/logout_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/chromeos/session/logout_button_tray.h"
 
 #include <memory>
 #include <utility>
 
 #include "ash/common/shelf/wm_shelf_util.h"
@@ skipping 16 matching lines @@
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/button/label_button_border.h"
 #include "ui/views/controls/button/md_text_button.h"
 #include "ui/views/painter.h"
 
 namespace ash {
 
 LogoutButtonTray::LogoutButtonTray(WmShelf* wm_shelf)
-    : TrayBackgroundView(wm_shelf),
+    : TrayBackgroundView(wm_shelf, false),
       button_(nullptr),
       login_status_(LoginStatus::NOT_LOGGED_IN),
       show_logout_button_in_tray_(false) {
   views::MdTextButton* button =
       views::MdTextButton::Create(this, base::string16());
   button->SetProminent(true);
   button->SetBgColorOverride(gfx::kGoogleRed700);
   // Base font size + 2 = 14.
   // TODO(estade): should this 2 be shared with other tray views? See
   // crbug.com/623987
@@ skipping 75 matching lines @@
     button_->SetText(base::string16());
     button_->SetAccessibleName(title);
     button_->SetImage(views::LabelButton::STATE_NORMAL,
                       gfx::CreateVectorIcon(kShelfLogoutIcon, kTrayIconColor));
     button_->SetMinSize(gfx::Size(kTrayItemSize, kTrayItemSize));
   }
   UpdateVisibility();
 }
 
 }  // namespace ash