GitLab

HandleSignalTracker's SimpleWatcher objects always used the default task
runner. This CL fixes this by passing a more appropriate task runner
obtained from Connector.

Bug: 870606
Change-Id: Ib9028175d224b7768606ac1b2319662bd9700f37
Reviewed-on: https://chromium-review.googlesource.com/c/1328550Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Hajime Hoshi <hajimehoshi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607147}