An article on LifeHacker gave this widget which highlights code in your google chrome browser. https://chrome.google.com/extensions/detail/ljgkhjkajfkphkgndbhokcoglecihaia
Ah but hold on, it requires the following permissions: Your data on all websites
I am sure it needs to do this for a genuine reason but I just don't like this message. Notepad++ carries out syntax highlighting without going off to a server somewhere I would hope it could be done in a Chrome extension. Anyway, don't like the message. I think I will avoid for now.