Migrate upgrade notifications to observer

chrome/browser/ui/toolbar/app_menu_icon_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_TOOLBAR_APP_MENU_ICON_CONTROLLER_H_
 #define CHROME_BROWSER_UI_TOOLBAR_APP_MENU_ICON_CONTROLLER_H_
 
 #include "base/macros.h"
+#include "chrome/browser/upgrade_observer.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 
 #if defined(OS_WIN)
 #include "chrome/browser/win/enumerate_modules_model.h"
 #endif
 
 class Profile;
 
 // AppMenuIconController encapsulates the logic for badging the app menu icon
 // as a result of various events - such as available updates, errors, etc.
 class AppMenuIconController :
 #if defined(OS_WIN)
     public EnumerateModulesModel::Observer,
 #endif
-    public content::NotificationObserver {
+    public content::NotificationObserver,
+    public UpgradeObserver {
  public:
   enum class IconType {
     NONE,
     UPGRADE_NOTIFICATION,
     GLOBAL_ERROR,
     INCOMPATIBILITY_WARNING,
   };
   enum class Severity {
     NONE,
     LOW,
@@ skipping 25 matching lines @@
   // etc. and based on that information trigger an appropriate call to the
   // delegate.
   void UpdateDelegate();
 
  private:
   // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
+  // UpgradeObserver implementation.
+  void OnUpgradeRecommended() override;
+
 #if defined(OS_WIN)
   // EnumerateModulesModel:
   void OnScanCompleted() override;
   void OnConflictsAcknowledged() override;
 #endif
 
   Profile* profile_;
   Delegate* delegate_;
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(AppMenuIconController);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_APP_MENU_ICON_CONTROLLER_H_