Simplify perseus' jipt handling, now that there is a callback.
Simplify perseus' jipt handling, now that there is a callback.

Test Plan:
In web app:
arc patch D7427
Here:
make all
In web app go to:
http://translate.khanacademy.dev/math/trigonometry/functions_and_graphs/function_introduction/e/functions_1

and click on the perseus text and update it with jipt.

Reviewers: jack, alpert

Reviewed By: jack, alpert

Differential Revision: http://phabricator.khanacademy.org/D7428

junyiacademy/perseus,junyiacademy/perseus,chirilo/perseus,ariabuckles/perseus,abe4mvp/perseus,daukantas/perseus,ariabuckles/perseus,alexristich/perseus,huangins/perseus,ariabuckles/perseus,learningequality/perseus,huangins/perseus,iamchenxin/perseus,chirilo/perseus,daukantas/perseus,ariabuckles/perseus,alexristich/perseus,sachgits/perseus,learningequality/perseus,sachgits/perseus,iamchenxin/perseus,abe4mvp/perseus