These scripts are copied (with small modifications) from the equivalent
scripts for ChromeShell. The scripts for ChromeShell will be deleted
soon when ChromeShell goes away.
BUG=484934
Review URL: https://codereview.chromium.org/1159203002
Cr-Original-Commit-Position: refs/heads/master@{#331982}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: b777fe906e0846a1fcd6d01e3626768a1533e30b
newt