GitLab

This CL also introduces a new UMA metric,
ClearBrowsingData_SameSiteNoneData, which is used in
BrowsingDataBridgeTest.java and will also be used to track usage
of the feature once it is released.

Bug: 1166674
Change-Id: I00aebaf4b5192e187fb42e7947b52ea046bf4276
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2627766
Commit-Queue: Dylan Cutler <dylancutler@google.com>
Reviewed-by: Christian Dullweber <dullweber@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846214}