GitLab

Remove the separate base::Feature, and tie enabling this to
when site isolation is enabled.

Bug: 946216
Change-Id: Ic14262b2fde78858b8f67f4e84ed35e199c2d3b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354271
Commit-Queue: Bo <boliu@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797987}