Implement Old JsonWire Local Storage Endpoints

[austinrr]

I'm currently using the https://github.com/SeleniumHQ/selenium/wiki/JsonWireProtocol#sessionsessionidlocal_storage POST to add a key/value to the browsers local storage as part of some testing for a product I work on. I'd like to see this implemented in the current version of the webdriver spec as well.

[jimevans]

I would oppose this proposal. It's possible to use the Execute JavaScript command to update local storage; it's a historical anomaly that the end point was added to the JSON Wire Protocol in the first place.