GitLab

This CL uses optimization guide to fetch the public image URLs as hints
and sends to renderer where URL loader throttles allow redirect only
for the subresource URLs in the list.

Change-Id: Id654d041c376420a6e4d2a4daf3fdb51b24056f9
Bug: 1042869
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1996944
Commit-Queue: rajendrant <rajendrant@chromium.org>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Sophie Chang <sophiechang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735105}