commit bb4ba82e7889cc802c1d31f3bc501037f45ae707
author Nate Chapin <japhet@chromium.org> Fri May 25 23:03:59 2018
committer Commit Bot <commit-bot@chromium.org> Fri May 25 23:03:59 2018
tree 3986c2fb5bf4a98d1649299ab657274746fdee0a
parent 0dd64bcc3f8949e7c01a6d91399f6f88d20104ef

Support WorkerSchedulers for nested workers

Currently, FrameSchedulerImpl keeps a set of throttling observers that
it notifies when throttling state changes. This includes each worker's
WorkerSchedulerProxy.

This CL moves throttling observers to the base class,
FrameOrWorkerScheduler, allowing each nested worker to register its
WorkerSchedulerProxy with its parent WorkerScheduler, so the
WorkerScheduler can then propagate throttling state to the nested
worker.

Bug: 829119
Change-Id: If005e3ec781b2fc0ecd3ba1ba73fa4b0e6ef1a0f
Reviewed-on: https://chromium-review.googlesource.com/994060
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Nate Chapin <japhet@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562052}