Remove ash's MaterialDesignController.

ash/system/status_area_widget.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 "ash/system/status_area_widget.h"
 
-#include "ash/material_design/material_design_controller.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/wm_shelf.h"
 #include "ash/shell.h"
 #include "ash/system/ime_menu/ime_menu_tray.h"
 #include "ash/system/overview/overview_button_tray.h"
 #include "ash/system/palette/palette_tray.h"
 #include "ash/system/palette/palette_utils.h"
 #include "ash/system/session/logout_button_tray.h"
 #include "ash/system/status_area_widget_delegate.h"
@@ skipping 147 matching lines @@
   system_tray_->SchedulePaint();
   virtual_keyboard_tray_->SchedulePaint();
   logout_button_tray_->SchedulePaint();
   ime_menu_tray_->SchedulePaint();
   if (palette_tray_)
     palette_tray_->SchedulePaint();
   overview_button_tray_->SchedulePaint();
 }
 
 const ui::NativeTheme* StatusAreaWidget::GetNativeTheme() const {
-  return MaterialDesignController::IsShelfMaterial()
-             ? ui::NativeThemeDarkAura::instance()
-             : Widget::GetNativeTheme();
+  return ui::NativeThemeDarkAura::instance();
 }
 
 void StatusAreaWidget::OnNativeWidgetActivationChanged(bool active) {
   Widget::OnNativeWidgetActivationChanged(active);
   if (active)
     status_area_widget_delegate_->SetPaneFocusAndFocusDefault();
 }
 
 void StatusAreaWidget::UpdateShelfItemBackground(SkColor color) {
   web_notification_tray_->UpdateShelfItemBackground(color);
@@ skipping 45 matching lines @@
   ime_menu_tray_ = new ImeMenuTray(wm_shelf_);
   status_area_widget_delegate_->AddTray(ime_menu_tray_);
 }
 
 void StatusAreaWidget::AddOverviewButtonTray() {
   overview_button_tray_ = new OverviewButtonTray(wm_shelf_);
   status_area_widget_delegate_->AddTray(overview_button_tray_);
 }
 
 }  // namespace ash