[AppCache] Remove NOTIMPLEMENTED from OnTransferSizeUpdated.

As far as I can tell just ignoring UpdateURLLoaderRequest::OnTransferSizeUpdated
is the right thing to do, so get rid of the NOTIMPLEMENTED to avoid spamming
log messages.

Bug: none
Change-Id: Ic08f3dceaed1f83fb667a43be84217d886e9ef2b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1534147
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Auto-Submit: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643037}
1 file changed