
Fix JS error when calling MenuButton#setOpen(false) if menu button hasn't been rendered yet.

R=gboyer
DELTA=4  (2 added, 0 deleted, 2 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=461


git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@695 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

johan/closure-library,johan/closure-library,johan/closure-library