Motive behind the change: calls to Profile() currently crash unless they
are triggered from the main thread, but it's somewhat difficult to know
that from the code. It makes more sense to silently ignore those
particularly so we can easily have the same code be threaded or not.
This also removes a few profiling calls that don't make much sense.
Differential Revision: https://code.wildfiregames.com/D1853
This was SVN commit r22248.
wraitii
75d0c56070