Chromium change:

https://chromium.googlesource.com/chromium/src/+/b36394cad79024db5bff0935006b34d0fd20b6dd

commit b36394cad79024db5bff0935006b34d0fd20b6dd
Author: Steven Zhu <jz@chromium.org>
Date:   Tue Jun 4 16:10:46 2019 +0000

    [Chromecast] Pass in |io_task_runner| to GCM components.

    When |io_task_runner| is power managed, delayed tasks and timers running on it
    can wake up the system.

    Bug: internal b/132993317