sheriff: Disable a flaky IncrementalMarkingTest test on tsan

TBR=omerkatz@chromium.org

Bug: 1058622, 986235
Change-Id: I962cffbac427973f05d62251949e743aabf8c2bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2087957Reviewed-by: Brandon Tolsch <btolsch@chromium.org>
Commit-Queue: Brandon Tolsch <btolsch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747050}

third_party/blink/renderer/platform/heap/incremental_marking_test.cc

@@ -1414,8 +1414,15 @@ TEST_F(IncrementalMarkingTest, DropBackingStore) {
   driver.FinishGC();
 }
 
-
-TEST_F(IncrementalMarkingTest, NoBackingFreeDuringIncrementalMarking) {
+// TODO(crbug.com/1058622): Disabled for TSAN flakes.
+#if defined(THREAD_SANITIZER)
+#define MAYBE_NoBackingFreeDuringIncrementalMarking \
+  DISABLED_NoBackingFreeDuringIncrementalMarking
+#else
+#define MAYBE_NoBackingFreeDuringIncrementalMarking \
+  NoBackingFreeDuringIncrementalMarking
+#endif
+TEST_F(IncrementalMarkingTest, MAYBE_NoBackingFreeDuringIncrementalMarking) {
   // Regression test: https://crbug.com/870306
   // Only reproduces in ASAN configurations.
   using WeakStore = HeapHashCountedSet<WeakMember<Object>>;