From 6d9dcd087a032ee2962d0e27223a076fcbc72298 Mon Sep 17 00:00:00 2001
From: Tetsuharu OHZEKI <saneyuki.snyk@gmail.com>
Date: Wed, 28 May 2014 04:38:46 +0900
Subject: [PATCH] Make 'Cell<Option<JS<T>>>' traceable.

---
 src/components/script/dom/bindings/trace.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/components/script/dom/bindings/trace.rs b/src/components/script/dom/bindings/trace.rs
index 1cc17474973..9c7f295795e 100644
--- a/src/components/script/dom/bindings/trace.rs
+++ b/src/components/script/dom/bindings/trace.rs
@@ -168,6 +168,12 @@ impl<T: Reflectable+Encodable<S, E>, S: Encoder<E>, E> Encodable<S, E> for Cell<
     }
 }
 
+impl<T: Reflectable+Encodable<S, E>, S: Encoder<E>, E> Encodable<S, E> for Cell<Option<JS<T>>> {
+    fn encode(&self, s: &mut S) -> Result<(), E> {
+        self.get().encode(s)
+    }
+}
+
 /// for a field which contains non-POD type contains DOMType
 impl<T: Reflectable+Encodable<S, E>, S: Encoder<E>, E> Encodable<S, E> for RefCell<Vec<JS<T>>> {
     fn encode(&self, s: &mut S) -> Result<(), E> {