Make clear that reportConnectionError() stops the code flow.

Make clear that reportConnectionError() stops the code flow.

Use it as if 'returning' a value for getConnection().
It doesn't make sense to sometimes add a return false and
sometimes not. But it was confusing that it looked like
wfProfileOut( __METHOD__ ); could be called twice.

Change-Id: I09638a134fcc925410389660f85239e8aa16483e