Fix AppCacheSubresourceURLFactory::CreateLoaderAndStart() 'crashes'

Temporary workaround to avoid crash reporting when
AppCacheSubresourceURLFactory::CreateLoaderAndStart() is called after
the RPHI associated with |appcache_host_->process_id()| has already
been destroyed. This is similar to the behavior allowed before
http://crrev.com/c/1409732 and is intended to be a minimal fix that can
be merged to M73.

Bug: 910287
Change-Id: Ic14013095c2deeadbef81f800bf6d23ce95bdca1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1530003
Commit-Queue: Aaron Colwell <acolwell@chromium.org>
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Auto-Submit: Aaron Colwell <acolwell@chromium.org>
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642641}
1 file changed