Add the "silent" property to the NotificationOptions dictionary.

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 60 matching lines @@
         exceptionState.throwTypeError("Illegal constructor.");
         return nullptr;
     }
 
     Notification* notification = new Notification(title, context);
 
     notification->setBody(options.body());
     notification->setTag(options.tag());
     notification->setLang(options.lang());
     notification->setDir(options.dir());
+    notification->setSilent(options.silent());
     if (options.hasIcon()) {
         KURL iconUrl = options.icon().isEmpty() ? KURL() : context->completeURL(options.icon());
         if (!iconUrl.isEmpty() && iconUrl.isValid())
             notification->setIconUrl(iconUrl);
     }
 
     String insecureOriginMessage;
     UseCounter::Feature feature = context->securityOrigin()->canAccessFeatureRequiringSecureOrigin(insecureOriginMessage)
         ? UseCounter::NotificationSecureOrigin : UseCounter::NotificationInsecureOrigin;
     UseCounter::count(context, feature);
 
     notification->scheduleShow();
     notification->suspendIfNeeded();
     return notification;
 }
 
 Notification* Notification::create(ExecutionContext* context, const String& persistentId, const WebNotificationData& data)
 {
     Notification* notification = new Notification(data.title, context);
 
     notification->setPersistentId(persistentId);
     notification->setDir(data.direction == WebNotificationData::DirectionLeftToRight ? "ltr" : "rtl");
     notification->setLang(data.lang);
     notification->setBody(data.body);
     notification->setTag(data.tag);
+    notification->setSilent(data.silent);
 
     if (!data.icon.isEmpty())
         notification->setIconUrl(data.icon);
 
     notification->setState(NotificationStateShowing);
     notification->suspendIfNeeded();
     return notification;
 }
 
 Notification::Notification(const String& title, ExecutionContext* context)
     : ActiveDOMObject(context)
     , m_title(title)
     , m_dir("auto")
+    , m_silent(false)
     , m_state(NotificationStateIdle)
     , m_asyncRunner(this, &Notification::show)
 {
     ASSERT(notificationManager());
 }
 
 Notification::~Notification()
 {
 }
 
@@ skipping 11 matching lines @@
     if (Notification::checkPermission(executionContext()) != WebNotificationPermissionAllowed) {
         dispatchErrorEvent();
         return;
     }
 
     SecurityOrigin* origin = executionContext()->securityOrigin();
     ASSERT(origin);
 
     // FIXME: Do CSP checks on the associated notification icon.
     WebNotificationData::Direction dir = m_dir == "rtl" ? WebNotificationData::DirectionRightToLeft : WebNotificationData::DirectionLeftToRight;
-    WebNotificationData notificationData(m_title, dir, m_lang, m_body, m_tag, m_iconUrl);
+    WebNotificationData notificationData(m_title, dir, m_lang, m_body, m_tag, m_iconUrl, m_silent);
     notificationManager()->show(WebSerializedOrigin(*origin), notificationData, this);
 
     m_state = NotificationStateShowing;
 }
 
 void Notification::close()
 {
     if (m_state != NotificationStateShowing)
         return;
 
@@ skipping 104 matching lines @@
     return m_state == NotificationStateShowing || m_asyncRunner.isActive();
 }
 
 DEFINE_TRACE(Notification)
 {
     RefCountedGarbageCollectedEventTargetWithInlineData<Notification>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink