Suppress data races in blink::Scheduler

BUG=456095
TBR=skyostil@chromium.org

Review URL: https://codereview.chromium.org/895753003

Cr-Commit-Position: refs/heads/master@{#315027}

build/sanitizers/tsan_suppressions.cc

@@ -322,6 +322,9 @@ char kTSanDefaultSuppressions[] =
 // https://crbug.com/455665
 "race:mojo::common::*::tick_clock\n"
 
+// https://crbug.com/456095
+"race:blink::Scheduler\n"
+
 // End of suppressions.
 ;  // Please keep this semicolon.