GitLab

* Wires evend reporting for Explore on Content from the bridge to the
  contextual content suggestions service

Bug: 824185, 824186
Change-Id: Ie03931a90c6ad7bb2db204fe26ce2a769c81d141
Reviewed-on: https://chromium-review.googlesource.com/989410
Commit-Queue: Filip Gorski <fgorski@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Donn Denman <donnd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547612}