GitLab

WebLayer doesn't need prediction logic so abstract it out into a
delegate interfact and move Chrome-specific logic into
ChromePrerenderManagerDelegate.

Bug: 1096088
Change-Id: I0daf2a64e5f195a4e5826ec7f4c9e89a402b04b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2326673Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Ryan Sturm <ryansturm@chromium.org>
Commit-Queue: Mugdha Lakhani <nator@chromium.org>
Cr-Commit-Position: refs/heads/master@{#794451}