Revert of Worker: Import "imported/wpt/workers" tests (patchset #8 id:140001 of https://codereview.chromium.org/2405143002/ )

Reason for revert:
Breaking webkit tests.
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Mac10.11%20%28dbg%29/builds/5263
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Linux%20Precise%20%28dbg%29

https://chromium.googlesource.com/chromium/src.git/+/6fc07dd70746be87e4cb8b20d2eb523f373b5787
attempted to fix, but that did not work, so rather than attempting another
fix I'm reverting this patch.

Original issue's description:
> Worker: Import "imported/wpt/workers" tests
>
> BUG=651778, 655458
>
> Committed: https://crrev.com/c13d3c7bc7f23b5435b98266f191de25b7df400a
> Cr-Commit-Position: refs/heads/master@{#424989}

TBR=tkent@chromium.org,nhiroki@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=651778, 655458

Review-Url: https://codereview.chromium.org/2420483004
Cr-Commit-Position: refs/heads/master@{#425126}
236 files changed