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This mainly gives me the ability to use resultdb to do some analysis
because experimental steps are not stored. crbug.com/1115614.

Bug: 1111979
Change-Id: Ie185dadc54d36ec6d2815652290806f477fb0298
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2505726Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: Sven Zheng <svenzheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822021}