Re: Update tools to include manifest v4 and csswg-test support (#4380)

Bah, we have some of the new lints failing!

```
CONTENT-VISUAL: navigation-timing/nav2_data_uri.html Visual test whose filename doesn't end in '-visual'
CONTENT-VISUAL: navigation-timing/nav2_test_open_data_uri.html Visual test whose filename doesn't end in '-visual'
```

View on GitHub: https://github.com/w3c/web-platform-tests/pull/4380#issuecomment-268644544

Received on Wednesday, 21 December 2016 21:27:20 UTC