Lots of tests use nsIDOMWindowUtils, so we should just expose it wholesale via SpecialPowers. I have a patch that exposes the current window's implementation as SpecialPowers.DOMWindowUtils. This should let us fix a whole raft of tests that are using enablePrivilege just to get at this interface. bz wrote the meat of this patch for me, I just wired it all up. It's a little hard to follow, but we expose all the properties on the object via another object, but functions get an anonymous wrapper that calls the original, so that they get called from a privileged scope.

Here's the patch. I'm going to fix tests in a separate patch.

Comment on attachment 520953 [details] [diff] [review] Expose DOMWindowUtils via SpecialPowers. This looks really cool. I had no idea this level of wizardry was available to us. Thanks bz and ted. I'm building a new fennec desktop to try out the patch in, but the patch is very straightforward so I'm pretty confident with the r+. I'll report back if I find problems on fennec desktop.

Rebased.

FYI, this works great in Fenenc desktop.