From the crashes associated with bug 1389021, we know that some
compositor thread IPDL owners are not being cleaned up properly. We do
not know which protocols are causing the problem, so we temporarily will
annotate the logs with the ownership status. This should be limited to
under a dozen instances of the protocols.
This change will be backed out after a few builds are produced with it
and we see the first crash reports with the relevant data.
We will use the new type for the generated IPDL message handler
prototype to make sure correct error handling method is called.
MozReview-Commit-ID: AzVbApxFGZ0