Expose kSafeBrowsingExtendedReportingOptInAllowed pref in Java

This CL makes it possible to disable the checkbox for extended Safe
Browsing reporting from Java.

Bug: 938902
Change-Id: I82eaa03094cd75cd3da4dc3235dfc7bd681d29f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1660862
Commit-Queue: Alex Ilin <alexilin@chromium.org>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Cr-Commit-Position: refs/heads/master@{#670011}
2 files changed