Make zoom work in Chrome
Make zoom work in Chrome

So even though spec says that opening a blank address loads
`about:blank` by default, Chrome does something fucky and gets into a
state where text won't zoom at all. If we pass the address in explicitly
then it all works properly.

Fixes #536

puppetlabs/showoff,puppetlabs/showoff,marrero984/showoff,puppetlabs/showoff,binford2k/showoff,binford2k/showoff,puppetlabs/showoff,binford2k/showoff,marrero984/showoff,slambert/showoff,marrero984/showoff,slambert/showoff,binford2k/showoff,marrero984/showoff,slambert/showoff,slambert/showoff