Add missing #include. Would not compile locally on Linux without adding #include <algorithm>. BUG=none Change-Id: I2f817faf681234c0e7eeeda0ad837e8285d9071a Reviewed-on: https://chromium-review.googlesource.com/941613 Commit-Queue: Frank Henigman <fjhenigman@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Luc Ferron <lucferron@chromium.org>