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This flag is user-facing, should not have an expiration date.
See [1] for an example.

[1] https://developers.google.com/web/tools/chrome-devtools/ui#experiments

Change-Id: I287a7707d3f896515ea65481e376df5ad16251fb
Reviewed-on: https://chromium-review.googlesource.com/c/1351603Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611208}