bug 1015763 - e10s getTabForContentWindow throws
bug 1005488 - deprecate content/content

our tests never clean prefs after themselves
Merge pull request #1503 from zombie/1005488-deprecate-content

bug 1005488 - deprecate content/content, set test pref, r=@jsantell
Merge pull request #1498 from zombie/1015763-getTabForContentWindow

bug 1015763 - getTabForContentWindow throws with e10s, r=@ZER0
Bug 1015396 - Get rid of apiSandbox. r=irakli

Currently, Jetpack uses two sandboxes for each content script - one for the
content script itself, and another for SDK machinery. And we end up getting Xrays
between the sandboxes, even though they're same-origin (generally with an nsEP)
because Jetpack sandboxes use |wantXrays: true| to get same-origin Xrays.

Object Xrays cause all sorts of communication problems between the sandboxes.
Irakli says we don't actually need the separate sandbox anymore since we've
removed the proxy layer, so let's just get rid of it.