GitLab

Revert of ios: Remove use of MessageLoopProxy and deprecated MessageLoop APIs (patchset #3 id:40001 of https://codereview.chromium.org/1160403005/)

Reason for revert:
Broke IOS_Device compile.
https://build.chromium.org/p/chromium.mac/builders/iOS_Device/builds/8802

Original issue's description:
> ios: Remove use of MessageLoopProxy and deprecated MessageLoop APIs
>
> BUG=465354
>
> Committed: https://crrev.com/9c8e5d7259661cda32b698ee88254491e6984900
> Cr-Commit-Position: refs/heads/master@{#333080}

TBR=stuartmorgan@chromium.org,skyostil@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=465354

Review URL: https://codereview.chromium.org/1167533009

Cr-Commit-Position: refs/heads/master@{#333083}