GitLab

To delete WebURLLoaderImpl::SinkPeer, this CL has PrefetchURLLoader
to handle no-state prefetch requests.

Bug: 1112310
Change-Id: I2c13bd91969bdb41105f246d570f9ca100a63c4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2041152Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Dominic Farolino <dom@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795753}