GitLab

Add a default configuration for the GamepadPollingInterval finch
experiment to fieldtrial_testing_config.json.

BUG=855188

Change-Id: I0168675acaa21c95db0e6f61d4735a5dc791ef61
Reviewed-on: https://chromium-review.googlesource.com/1191808Reviewed-by: Robert Kaplow (slow) <rkaplow@chromium.org>
Commit-Queue: Matt Reynolds <mattreynolds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587234}