Add mising paramater to PluginArray.prototype.refresh method in externs.
Add mising paramater to PluginArray.prototype.refresh method in externs.

R=johnlenz

git-svn-id: 818616af560c21f974e3119d89e3310384da871a@2129 b0f006be-c8cd-11de-a2e8-8d36a3108c74

weitzj/closure-compiler,weitzj/closure-compiler