Then, make sure it doesn't make our tree catch fire by watching [the waterfall](https://build.chromium.org/p/client.flutter/waterfall). The waterfall runs
slightly different tests than Travis, so it's possible for the tree to go red even if
Travis did not. If that happens, please immediately revert your change. Do not check
anything in while the tree is red unless you are trying to resolve the problem.
Please make sure all your checkins have detailed commit messages explaining the patch.
If you made multiple commits for a single pull request, either make sure each one has a detailed
message explaining that specific commit, or squash your commits into one single checkin with a
