Revert of Revert of Remove the last piece of deprecated synchronous IO code. (patchset #1 of https://codereview.chromium.org/509893002/)
Reason for revert:
https://codereview.chromium.org/510893003/ fixed the ledger bot, so I am going to revert this revert CL.
Original issue's description:
> Revert of Remove the last piece of deprecated synchronous IO code. (patchset #5 of https://codereview.chromium.org/460373002/)
>
> Reason for revert:
> Build failure on Google Chrome ChromeOS:
>
> http://build.chromium.org/p/chromium.chrome/buildstatus?builder=Google%20Chrome%20ChromeOS&number=71164
>
> Original issue's description:
> > Remove the last piece of deprecated synchronous IO code.
> >
> > BUG=337096
> > TEST=bots
> >
> > Committed: https://chromium.googlesource.com/chromium/src/+/c4a64ffdd0d511c66d774341fa0a318af7911193
>
> TBR=dalecurtis@chromium.org,ajm@chromium.org,rkc@chromium.org,avi@chromium.org,palmer@chromium.org,xians@chromium.org
> NOTREECHECKS=true
> BUG=337096
>
> Committed: https://chromium.googlesource.com/chromium/src/+/3e8c19c89c16fe8a7c2dfe0cae2990cd4a004339
TBR=dalecurtis@chromium.org,ajm@chromium.org,rkc@chromium.org,avi@chromium.org,palmer@chromium.org,tnagel@chromium.org
NOTREECHECKS=true
BUG=337096
Review URL: https://codereview.chromium.org/518433002
Cr-Commit-Position: refs/heads/master@{#292463}
43 files changed
