(experimental): showcase allowing protractor to restart browser between ...

...tests
Same question as previous PR: 
using `bind` will reduce it to 1 line (and without sacrifice to clarity imo), but inconsistent with the use of self=this previously. 

I could do 
```
function() {
  this.driverprovider_.quitDriver.apply(this.driverprovider_, arguments);
}
``` 
though if you think that's more consistent.