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To use the switch:
1) Install the build that contains this CL.
2) Go to dev console, open /etc/chrome_dev.conf
3) Append:
   --rlz-ping-delay=1 (or any value)
4) Save and exit, run "restart ui" (or reboot the device) to make the
   switch take effect.

TBR=rogerta@chromium.org

Bug: None
Change-Id: I8431d0cb3a376b5e5aa0b35ff7d155110324716a
Reviewed-on: https://chromium-review.googlesource.com/994141Reviewed-by: Wenzhao (Colin) Zang <wzang@chromium.org>
Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547938}