commit 1eb2d22874249cebe5620253b02fe9a4f551a420
author Dave Tapuska <dtapuska@chromium.org> Wed Dec 19 15:01:54 2018
committer Commit Bot <commit-bot@chromium.org> Wed Dec 19 15:01:54 2018
tree dc2c9442977b2c941e448a1576a6a0dced4517f3
parent 45e536a9674fabe334db2fe58c1f5cd0b9757425

Pausing Worker Task Scheduler support

With the cleanup of Pausable objects it was discovered that workers
don't pause their event queues like the main thread does. Add support
to pause certain tasks (that match the main thread event queue).

Worker tasks that are pausable (import & evaluate) are moved to the
kDOMManipulation queue from the kInternalWorker queue. The
kDOMManipulation is to be used for the connect message; see
https://html.spec.whatwg.org/multipage/workers.html#worker-processing-model
The kDOMManipulation queue is pausable whereas kInternalWorker is not.
This fixes an ordering issues that pausing the queues generates and also
will allow us in the future to remove the paused task list in the
worker global scope.

BUG=907125

Change-Id: I21d30323107244f04e6a8fe179f2a8ebb3dad144
Reviewed-on: https://chromium-review.googlesource.com/c/1377347
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617833}