From 5d9538ac63527e03046df5209a2618a40a5a78f1 Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@mit.edu>
Date: Tue, 25 Feb 2014 18:52:21 -0500
Subject: [PATCH] Back out revision c35458a437cc (bug 976305) for breaking
 DataStore tests. r=orange

---
 dom/bindings/Codegen.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dom/bindings/Codegen.py b/dom/bindings/Codegen.py
index 355898c78075..0f116cfde065 100644
--- a/dom/bindings/Codegen.py
+++ b/dom/bindings/Codegen.py
@@ -5939,7 +5939,10 @@ class CGAbstractStaticBindingMethod(CGAbstractStaticMethod):
 
     def definition_body(self):
         unwrap = CGGeneric("""JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
-JS::Rooted<JSObject*> obj(cx, &args.callee());""")
+JS::Rooted<JSObject*> obj(cx, args.computeThis(cx).toObjectOrNull());
+if (!obj) {
+  return false;
+}""")
         return CGList([ CGIndenter(unwrap),
                         self.generate_code() ], "\n\n").define()