Add the vibrate attribute to the Notification object

Source/modules/notifications/NotificationOptions.idl

Index: Source/modules/notifications/NotificationOptions.idl
diff --git a/Source/modules/notifications/NotificationOptions.idl b/Source/modules/notifications/NotificationOptions.idl
index 716ce68f4ea9ae8c1bc3eadbb29dbcf4536f7859..2965f978a4cd92021e00468588a63d2c07cbefbd 100644
--- a/Source/modules/notifications/NotificationOptions.idl
+++ b/Source/modules/notifications/NotificationOptions.idl
@@ -16,6 +16,11 @@ dictionary NotificationOptions {
     DOMString body = "";
     DOMString tag = "";
     DOMString icon;
+    // FIXME: The Union type VibrationPattern is not supported in NavigatorVibration.

[Peter Beverloo, 2015/04/07 11:37:31]

nit: We switched to attributed TODOs rather than unattributed FIXMEs.

TODO(sh919.park): Foobarbaz

[Sanghyun Park, 2015/04/08 08:00:03]

Okay I'll fix this.

+    //        If VibrationPattern is supported, we need to change with this.

[Peter Beverloo, 2015/04/07 11:37:31]

I think it would make sense to fix Issue 240176 first, that should be a very
trivial ~20 line patch, and introduce the VibrationPattern union typedef in
NavigatorVibration. Then we adopt that immediately.

[Sanghyun Park, 2015/04/08 08:00:03]

I tried to make VibrationPattern union type like [1].
typedef ([Clamp] unsigned long or sequence<unsigned long>) VibratePattern;

But Union type does not support [Clamp] extended attribute. 
So I think that we need to fix idl parser in order to make VibratePattern union
type.

Currently, I am finding solution to support [Clamp] extended attribute in union.
I'm not familiar about idl parser, so it will take some time.

So, Can I write "FIXME" in this file? After implementing extended attribute in
union, I'll fix this.

[Peter Beverloo, 2015/04/08 16:40:01]

Ok, but please make sure that there's a bug. Also, s/FIXME/TODO(yourname)/

[Sanghyun Park, 2015/04/08 17:20:59]

Sure, I've search the bug, I could not find something like this. 
I'll use Issue 240176, when I fix this.

+    // FIXME: The contents of the pattern argument should be clamped.
+    //        See https://code.google.com/p/chromium/issues/detail?id=310138
+    [RuntimeEnabled=NotificationExperimental] (unsigned long or sequence<unsigned long>) vibrate;
     boolean silent = false;
     [RuntimeEnabled=NotificationExperimental] any data = null;
 };