In the build, we have a few cases of things that have the same name,
but they happen in different directories. While disambiguating them
in the profile itself might not be super important (although it may turn
out to be, but let's assume it's not that important for now because I
also don't really want to add the directory everywhere), not
disambiguating them while tracking the markers makes it so that when it
happens that ambiguous things are running in parallel, the profile ends
up with wrong data for the corresponding markers.
Differential Revision: https://phabricator.services.mozilla.com/D192044
