Fixing bug: Uncaught TypeError: Object #<Object> has no method 'sendMessage'  in timer.js

OS: Linux Crunchbang10 Statler (Debian based)
Chrome: 22.0.1229.92
Bug:
![screenshot - 06252013 - 12 40 11 pm](https://f.cloud.github.com/assets/1391846/701702/ac1ccb38-dd7b-11e2-9f01-df1f1b3e7946.png)

Reference for fix: http://stackoverflow.com/questions/15718066/chrome-runtime-sendmessage-not-working-as-expected/15718294#15718294