[streams] Refactor to multi-global test format

[MattiasBuelens]

This changes all tests for streams to the multi-global .any.js format, and removes the old test wrappers.

Previously, the streams tests had to use custom test wrappers, because one of the tools used by the spec authors did not support auto-generating the necessary test boilerplate. This has been fixed in domenic/wpt-runner#12, so we can finally migrate the tests to the standard format. 😄

Fixes #10597

[MattiasBuelens]

Hmm, I guess I should have run wpt lint first. Travis complains about lint errors:

ERROR:lint:streams/piping/error-propagation-forward.any.js:143: setTimeout used; step_timeout should typically be used instead (SET TIMEOUT)

I guess we can no longer use setTimeout inside tests? 😕

[jgraham]

Presumably you moved files and a rule in lint.whitelist that previously matched now doesn't. But it would be good to remove the setTimeout use if possible.

[MattiasBuelens]

@jgraham You're right, the paths changed, so I had to update the whitelist.

I'll see if switching to step_timeout "just works", then we can probably remove these from the whitelist. 🤞

[MattiasBuelens]

Good news, it just works! 😄

[ricea]

lgtm

You no longer need the call to done() at the bottom of each js file. But it's not doing any harm.

[MattiasBuelens]

Something went wrong with Taskcluster for Firefox Nightly? 😕 Looks like git fetch failed, see log:

++ git remote add origin https://github.com/web-platform-tests/wpt.git
++ git fetch --quiet --depth=50 origin refs/pull/14172/merge
fatal: The remote end hung up unexpectedly
[taskcluster 2018-11-22 10:26:23.174Z] === Task Finished ===
[taskcluster 2018-11-22 10:26:23.281Z] Unsuccessful task run with exit code: 128 completed in 3.829 seconds

[jgraham]

I closed and reopened as that's the only way to retrigger taskcluster until https://bugzilla.mozilla.org/show_bug.cgi?id=1509083 is fixed (reruns have complex semantics in general and people tried to deprecate them as a result, but they're what we need in this case, so…).

[MattiasBuelens]

Rebased to fix conflicts with a51c2df.