[scheduler] Add shaseley@chromium.org to OWNERS

R=shaseley@chromium.org

Change-Id: Ie4f837610914c63732c8cda2025cf508aefa2f72
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1744414
Commit-Queue: Scott Haseley <shaseley@chromium.org>
Auto-Submit: Alexander Timin <altimin@chromium.org>
Reviewed-by: Scott Haseley <shaseley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#685289}

third_party/blink/public/platform/scheduler/OWNERS

-altimin@chromium.org
-alexclarke@chromium.org
-carlscab@google.com
-rmcilroy@chromium.org
-skyostil@chromium.org
+file://third_party/blink/renderer/platform/scheduler/OWNERS
 
 # TEAM: scheduler-dev@chromium.org
 # COMPONENT: Blink>Scheduling

third_party/blink/renderer/platform/scheduler/OWNERS

+# LON scheduling team
 altimin@chromium.org
 alexclarke@chromium.org
 carlscab@google.com
 rmcilroy@chromium.org
 skyostil@chromium.org
 
+# MTV web scheduling API team
+shaseley@chromium.org
+
 # TEAM: scheduler-dev@chromium.org
 # COMPONENT: Blink>Scheduling