GitLab

The param is always mojom::PrerenderMode::kPrefetchOnly, so it's not
necessary to pass it.

Bug: 755921
Change-Id: Id595b125d66569be5ed53e81356a845c52f1ca85
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2591843Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837079}