Followup to last checkin to delete constructor from Activation.prototype.

git-svn-id: svn://10.0.0.236/trunk@174488 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/js/narcissus/jsexec.js

@@ -740,8 +740,10 @@ function Activation(f, a) {
 
 
 // Null Activation.prototype's proto slot so that Object.prototype.* does not
-// pollute the scope of heavyweight functions.
+// pollute the scope of heavyweight functions.  Also delete its 'constructor'
+// property so that id doesn't pollute function scopes.
 Activation.prototype.__proto__ = null;
+delete Activation.prototype.constructor;
 
 function FunctionObject(node, scope) {
     this.node = node;