No bug - s/bool/booleans/ in an error message in xpidl.py. r=me
Bug 854880 - Make canceling a RunnableFunction actually cancel the task.
Bug 854924 - Change "can't allocate graphics resources" in TabParent to an NS_WARNING.

We hit this assertion during our tests, which sometimes complete before
the subprocess is Show()'n.  This isn't a bug, as far as I can tell.

Changing the NS_ERROR to NS_WARNING keeps us from failing on tryserver.
Bug 852847 - Part 1: Disable browserElement_oop_KeyEvents.html.

In fact this test was already disabled; the OOP version was the same as
the in-process version because the test explicitly disabled OOP tabs.
Bug 852847 - Part 2: Do things later in our browser-element tests, thus avoiding doing things before the browser-element machinery has loaded.

Also set network.disable.ipc.security to true and leave it that way.  This prevents security errors in the tests which happen when we pop the pref.
Bug 852847 - Part 3: Re-enable some browser-element tests.
Bug 844323 - WIP: Move procesprioritymanager to main process.

Don't forget to remove ProcessPriorityManager-old.cpp
Bug 844323 - ProcessPriorityManager tests.