Provide a web driver for user acceptance testing

[Leo Arias]

Chromium has a web driver that lets us test web pages using selenium. This tool is really good for user acceptance testing as it has all the necessary functions to introspect the pages, wait for items, check for visibility, etc. We need this Selenium web driver in oxide.

We could use it with autopilot in order to test the user stories that involve webapps, online accounts and indicators, for example.

We have discussed a lot about this. We don't yet know how much effort and time it will take, but Alex Abreu is going to investigate about integrating the chromium dev tools into oxide, and that should give us an idea.