GitLab

changes:
Add a switch to make the feature dev behind the flag.

Bug: 805046
Test: unit_tests --gtest_filter=AboutFlagsHistogramTest*
Change-Id: I1b63060cf6b08557d94447b4a87f9ab07b192e1c
Reviewed-on: https://chromium-review.googlesource.com/890633Reviewed-by: James Cook <jamescook@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Qiang Xu <warx@google.com>
Cr-Commit-Position: refs/heads/master@{#532546}