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In PR https://github.com/web-platform-tests/wpt/pull/23922 a command was
added to the docs/ directory, and docs/ was added to tools/wpt/paths.
This means that running wpt now requires docs/command.json to exist.

The WPT Waterfall (go/wpt-waterfall) is currently broken by this.

Change-Id: Ie5514a6257f1d87f7a3da1fa758e655dd2312841
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2229063
Commit-Queue: Luke Z <lpz@chromium.org>
Commit-Queue: Robert Ma <robertma@chromium.org>
Auto-Submit: Luke Z <lpz@chromium.org>
Reviewed-by: Robert Ma <robertma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774666}