Consistently use location as global, and location.href for full url

The location object is a global, just like document.

Using it via 'window' needlessly adds complexity and, for example,
makes it harder to catch typos in static analysis.

Standardise on location.href in place of the many different
variants for accessing and assinging the full url:

 location =
 location.href =
 location.assign() =

And each with 'window', 'document' and without host object.

Change-Id: If88515bd88fc5b93ebacd4ec41fce02fec540f18
Merge "Consistently use location as global, and location.href for full url"