[scheduler] Update scheduler header guards after blink move.

R=skyostil@chromium.org

Change-Id: I316852571bffe939b896d321fe058e58d26cf626
Reviewed-on: https://chromium-review.googlesource.com/1000701
Commit-Queue: Alexander Timin <altimin@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549852}
81 files changed