[LPM] Fix GN issue with previous speculative fix.

TBR=mbarbella@chromium.org

Change-Id: Ia6780a4776c1745a622f365bcd35c5adf622ba91
Reviewed-on: https://chromium-review.googlesource.com/1155706
Reviewed-by: Jonathan Metzman <metzman@chromium.org>
Reviewed-by: Martin Barbella <mbarbella@chromium.org>
Commit-Queue: Jonathan Metzman <metzman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579157}