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Fixes a `gn check` failure.
Split out from crrev.com/c/2383400

Bug: 898837
Change-Id: I5dcc0ff5d00bfa04c241a07fc62c63c502a1ad74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2384691
Auto-Submit: Glen Robertson <glenrob@chromium.org>
Reviewed-by: Chris Mumford <cmumford@google.com>
Commit-Queue: Glen Robertson <glenrob@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803338}