Disable the two blink_heap_unittests that fail under tsan and run suite on tsan bot.

Disables HeapTest.CrossThreadWeakPersistent and HeapTest.ThreadedStrongification
under TSan.

Bug: 843511,915200,831674,913704
Change-Id: I6ab71b83fa937f739a57452a97bd43ef6375bf2c
Reviewed-on: https://chromium-review.googlesource.com/c/1377517
Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616652}
3 files changed