This code is obtained from https://github.com/sitespeedio/browsertime and all
changes to the code must be made there. It's installed through ./mach browsertime --setup
and it's used when running ./mach browsertime or through raptor with
./mach raptor --browsertime.
You can update this code by running ./mach browsertime --update-upstream-url <URL>, where
URL is a link to a github tarball of a particular commit in the aforementioned repository.
For more information, you can consult the wiki https://wiki.mozilla.org/TestEngineering/Performance/Raptor/Browsertime.
If you have any questions about this code, or browsertime, you can find us in
#browsertime, or #perftest in Riot.