Version 4.4.63.2 (cherry-pick)

Merged 39491c51

Restore NothingOrDone action in idle time handler.

BUG=chromium:460090,chromium:489323
LOG=N
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1153043002

Cr-Commit-Position: refs/branch-heads/4.4@{#4}
Cr-Branched-From: 2e4c5505-refs/heads/4.4.63@{#1}
Cr-Branched-From: 0208b8e3-refs/heads/master@{#28333}