Add update available icon in system tray

ash/system/tray/system_tray_controller.h

 // Copyright 2016 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.
 
 #ifndef ASH_SYSTEM_TRAY_SYSTEM_TRAY_CONTROLLER_H_
 #define ASH_SYSTEM_TRAY_SYSTEM_TRAY_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/public/interfaces/system_tray.mojom.h"
 #include "base/compiler_specific.h"
@@ skipping 23 matching lines @@
   bool active_directory_managed() const { return active_directory_managed_; }
 
   // Wrappers around the mojom::SystemTrayClient interface.
   void ShowSettings();
   void ShowBluetoothSettings();
   void ShowBluetoothPairingDialog(const std::string& address,
                                   const base::string16& name_for_display,
                                   bool paired,
                                   bool connected);
   void ShowDateSettings();
+  void ShowAboutChromeOS();
   void ShowSetTimeDialog();
   void ShowDisplaySettings();
   void ShowPowerSettings();
   void ShowChromeSlow();
   void ShowIMESettings();
   void ShowHelp();
   void ShowAccessibilityHelp();
   void ShowAccessibilitySettings();
   void ShowPaletteHelp();
   void ShowPaletteSettings();
   void ShowPublicAccountInfo();
   void ShowEnterpriseInfo();
   void ShowNetworkConfigure(const std::string& network_id);
   void ShowNetworkCreate(const std::string& type);
   void ShowThirdPartyVpnCreate(const std::string& extension_id);
   void ShowNetworkSettings(const std::string& network_id);
   void ShowProxySettings();
   void SignOut();
   void RequestRestartForUpdate();
+  void RequestUpdateCheck();
 
   // Binds the mojom::SystemTray interface to this object.
   void BindRequest(mojom::SystemTrayRequest request);
 
   // mojom::SystemTray overrides. Public for testing.
   void SetClient(mojom::SystemTrayClientPtr client) override;
   void SetPrimaryTrayEnabled(bool enabled) override;
   void SetPrimaryTrayVisible(bool visible) override;
   void SetUse24HourClock(bool use_24_hour) override;
   void SetEnterpriseDomain(const std::string& enterprise_domain,
                            bool active_directory_managed) override;
   void ShowUpdateIcon(mojom::UpdateSeverity severity,
                       bool factory_reset_required,
                       mojom::UpdateType update_type) override;
+  void ShowUpdateOverCellularAvailableIcon() override;
 
  private:
   // Client interface in chrome browser. May be null in tests.
   mojom::SystemTrayClientPtr system_tray_client_;
 
   // Bindings for the SystemTray interface.
   mojo::BindingSet<mojom::SystemTray> bindings_;
 
   // The type of clock hour display: 12 or 24 hour.
   base::HourClockType hour_clock_type_;
 
   // The domain name of the organization that manages the device. Empty if the
   // device is not enterprise enrolled or if it uses Active Directory.
   std::string enterprise_domain_;
 
   // Whether this is an Active Directory managed enterprise device.
   bool active_directory_managed_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTrayController);
 };
 
 }  // namspace ash
 
 #endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_CONTROLLER_H_