RFR: 8313177: Web Workers timeout with Webkit 616.1 [v2]

[Jay Bhaskar]

> Issue: Some web worker tests fail to finish.
> Root Cause:
> sharedTimerFiredInternal function from ThreadTimers class does not require an isMainThread check, The check was introduced during the initial webkit stabilization.

Jay Bhaskar has updated the pull request incrementally with one additional commit since the last revision:

  Add test case for worker timeout

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1191/files
  - new: https://git.openjdk.org/jfx/pull/1191/files/79b00ca7..06d46695

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1191&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1191&range=00-01

  Stats: 120 lines in 3 files changed: 120 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1191.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1191/head:pull/1191

PR: https://git.openjdk.org/jfx/pull/1191