* Creates a simple namespace variable declaration
* (e.g. <code>var foo = {};</code>).
*/
private Node makeVarDeclNode() {
Node name = IR.name(namespace);
name.addChildToFront(createNamespaceLiteral());
Node decl = IR.var(name);
decl.putBooleanProp(Node.IS_NAMESPACE, true);
// TODO(nicksantos): ew ew ew. Create a mutator package.