[WIP] Implement sound attr in notification

Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp

Index: Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp
diff --git a/Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp b/Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp
index 9b1da2f0d7ec9461c7f9d9284534d0f288aa0c06..f3de3231510b95c68b30d6feee7e0e36e54f637a 100644
--- a/Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp
+++ b/Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp
@@ -92,9 +92,16 @@ ScriptPromise ServiceWorkerRegistrationNotifications::showNotification(ScriptSta
             iconUrl = KURL();
     }
 
+    KURL soundUrl;
+    if (options.hasSound() && !options.sound().isEmpty()) {
+        soundUrl = executionContext->completeURL(options.sound());
+        if (!soundUrl.isValid())
+            soundUrl = KURL();
+    }
+
     WebNotificationData::Direction dir = options.dir() == "rtl" ? WebNotificationData::DirectionRightToLeft : WebNotificationData::DirectionLeftToRight;
     NavigatorVibration::VibrationPattern vibrate = NavigatorVibration::sanitizeVibrationPattern(options.vibrate());
-    WebNotificationData notification(title, dir, options.lang(), options.body(), options.tag(), iconUrl, vibrate, options.silent(), dataAsWireBytes);
+    WebNotificationData notification(title, dir, options.lang(), options.body(), options.tag(), iconUrl, soundUrl, vibrate, options.silent(), dataAsWireBytes);
     WebNotificationShowCallbacks* callbacks = new CallbackPromiseAdapter<void, void>(resolver);
 
     SecurityOrigin* origin = executionContext->securityOrigin();