Supports the sound attribute to the Notification object

public/platform/modules/notifications/WebNotificationData.h

Index: public/platform/modules/notifications/WebNotificationData.h
diff --git a/public/platform/modules/notifications/WebNotificationData.h b/public/platform/modules/notifications/WebNotificationData.h
index 75b2575bc93323c4a40354845645166bae443c01..c419de1fb0d4c22ae3c734872e0ba05089e50a15 100644
--- a/public/platform/modules/notifications/WebNotificationData.h
+++ b/public/platform/modules/notifications/WebNotificationData.h
@@ -24,6 +24,7 @@ struct WebNotificationData {
     {
     }
 
+    // FIXME: Remove this constructor when Chromium has switched to the new one.
     WebNotificationData(const WebString& title, Direction direction, const WebString& lang, const WebString& body, const WebString& tag, const WebURL& icon, const WebVector<int>& vibrate, bool silent, const WebVector<char>& data)
         : title(title)
         , direction(direction)
@@ -37,12 +38,27 @@ struct WebNotificationData {
     {
     }
 
+    WebNotificationData(const WebString& title, Direction direction, const WebString& lang, const WebString& body, const WebString& tag, const WebURL& icon, const WebURL& sound, const WebVector<int>& vibrate, bool silent, const WebVector<char>& data)
+        : title(title)
+        , direction(direction)
+        , lang(lang)
+        , body(body)
+        , tag(tag)
+        , icon(icon)
+        , sound(sound)
+        , vibrate(vibrate)
+        , silent(silent)
+        , data(data)
+    {
+    }
+
     WebString title;
     Direction direction;
     WebString lang;
     WebString body;
     WebString tag;
     WebURL icon;
+    WebURL sound;
     WebVector<int> vibrate;
     bool silent;
     WebVector<char> data;