Move low battery notification to Message Center.

ash/system/chromeos/settings/tray_settings.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/chromeos/settings/tray_settings.h"
 
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/chromeos/power/power_status.h"
 #include "ash/system/chromeos/power/power_status_view.h"
@@ skipping 46 matching lines @@
 
       base::string16 text = rb.GetLocalizedString(IDS_ASH_STATUS_TRAY_SETTINGS);
       label_ = new views::Label(text);
       AddChildView(label_);
       SetAccessibleName(text);
 
       power_view_right_align = true;
     }
 
     if (PowerStatus::Get()->IsBatteryPresent()) {
-      power_status_view_ = new ash::PowerStatusView(
-          ash::PowerStatusView::VIEW_DEFAULT, power_view_right_align);
+      power_status_view_ = new ash::PowerStatusView(power_view_right_align);
       AddChildView(power_status_view_);
       OnPowerStatusChanged();
     }
   }
 
   ~SettingsDefaultView() override { PowerStatus::Get()->RemoveObserver(this); }
 
   // Overridden from ash::ActionableView.
   bool PerformAction(const ui::Event& event) override {
     bool userAddingRunning = ash::Shell::GetInstance()
@@ skipping 86 matching lines @@
   default_view_ = NULL;
 }
 
 void TraySettings::DestroyDetailedView() {
 }
 
 void TraySettings::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 }
 
 }  // namespace ash