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The flag is a no-op and will be deprecated/removed in the future.

Change-Id: I51532a2bc2b8e03f0489b2ac05589101d709d0c1
Reviewed-on: https://chromium-review.googlesource.com/c/1312310
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604585}