But only if it doesn't have an error.
Also: reformatted message template in legacy_templates.js to match what
is in background.html for easier diffing.
Split out test-specific and general utility react components too.
And moved our test/legacy* files for the Style Guide into a styleguide/
subdirectory of test/.
I think we'll be able to live in this directory structure for a while.
Scott Nonnenberg