Implement native web notifications for mac

chrome/browser/notifications/notification_ui_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_H_
 #define CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 27 matching lines @@
     return static_cast<ProfileID>(profile);
   }
 
   virtual ~NotificationUIManager() {}
 
   // Creates an initialized UI manager.
   // TODO(dewittj): Remove the PrefService argument which is unused. See
   // crbug.com/530376
   static NotificationUIManager* Create(PrefService* local_state);
 
+  // Some platforms can integrate notifications with their own
+  // notification center. In those cases it will return a pointer
+  // to the object dealing with OS specific notifications which will
+  // be owned by the caller.
+  // Otherwise it will return null and chrome notifications will be
+  // used instead.
+  static NotificationUIManager* CreateNativeNotificationManager();
+
   // Adds a notification to be displayed. Virtual for unit test override.
   virtual void Add(const Notification& notification, Profile* profile) = 0;
 
   // Updates an existing notification. If |update_progress_only|, assume
   // only message and progress properties are updated.
   virtual bool Update(const Notification& notification, Profile* profile) = 0;
 
   // Returns the pointer to a notification if it match the supplied ID, either
   // currently displayed or in the queue.
   // This function can be bound for delayed execution, where a profile pointer
@@ skipping 32 matching lines @@
   virtual void CancelAll() = 0;
 
  protected:
   NotificationUIManager() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NotificationUIManager);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_H_