Notification actions may have an icon url.

third_party/WebKit/Source/modules/notifications/Notification.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 275 matching lines @@
 }
 
 HeapVector<NotificationAction> Notification::actions() const
 {
     HeapVector<NotificationAction> actions;
     actions.grow(m_data.actions.size());
 
     for (size_t i = 0; i < m_data.actions.size(); ++i) {
         actions[i].setAction(m_data.actions[i].action);
         actions[i].setTitle(m_data.actions[i].title);
+        actions[i].setIcon(m_data.actions[i].icon.string());
     }
 
     return actions;
 }
 
 String Notification::permissionString(WebNotificationPermission permission)
 {
     switch (permission) {
     case WebNotificationPermissionAllowed:
         return "granted";
@@ skipping 66 matching lines @@
 }
 
 DEFINE_TRACE(Notification)
 {
     visitor->trace(m_asyncRunner);
     RefCountedGarbageCollectedEventTargetWithInlineData<Notification>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink