There's no need to assume anything when we don't reduce the node.

R=bmeurer@chromium.org

Change-Id: Ic39b6e634c662824a72affd91318ca024f3e1055
Reviewed-on: https://chromium-review.googlesource.com/1105832Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53870}