diff --git a/dom/bindings/Codegen.py b/dom/bindings/Codegen.py
index 0a2de1e56da..536f80bb6ce 100644
--- a/dom/bindings/Codegen.py
+++ b/dom/bindings/Codegen.py
@@ -1337,10 +1337,6 @@ class PropertyArrays():
         return [ "staticMethods", "staticAttrs", "methods", "attrs",
                  "unforgeableAttrs", "consts" ]
 
-    @staticmethod
-    def xrayRelevantArrayNames():
-        return [ "methods", "attrs", "unforgeableAttrs", "consts" ]
-
     def hasChromeOnly(self):
         return any(getattr(self, a).hasChromeOnly() for a in self.arrayNames())
     def hasNonChromeOnly(self):
@@ -1417,7 +1413,7 @@ class CGCreateInterfaceObjectsMethod(CGAbstractMethod):
         # There is no need to init any IDs in workers, because worker bindings
         # don't have Xrays.
         if not self.descriptor.workers:
-            for var in self.properties.xrayRelevantArrayNames():
+            for var in self.properties.arrayNames():
                 props = getattr(self.properties, var)
                 # We only have non-chrome ids to init if we have no chrome ids.
                 if props.hasChromeOnly():
diff --git a/dom/tests/mochitest/chrome/test_sandbox_bindings.xul b/dom/tests/mochitest/chrome/test_sandbox_bindings.xul
index c8ef4ebac40..b4eebe77c2c 100644
--- a/dom/tests/mochitest/chrome/test_sandbox_bindings.xul
+++ b/dom/tests/mochitest/chrome/test_sandbox_bindings.xul
@@ -186,6 +186,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=741267
         for (var i in url) {
           url[i];
         }
+        isnot(url.createObjectURL, undefined, "Should have a createObjectURL");
         ok(true, "We didn't crash!");
       } catch (e) {
         ok(false, "URL interface object manipulation via an Xray shouldn't throw" + e);