Disable test: WorkerThreadTest.SyncTerminate_ImmediatelyAfterStart

It's failing on LSan/TSan/MSan.

TBR=nhiroki@chromium.org

No-Try: true
Bug: 1003217
Change-Id: I9cacf67f03a631ad8fbe1db8bea8bd063d910241
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1800131Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695946}

third_party/blink/renderer/core/workers/worker_thread_test.cc

@@ -296,7 +296,16 @@ TEST_F(WorkerThreadTest, AsyncTerminate_ImmediatelyAfterStart) {
   EXPECT_EQ(ExitCode::kGracefullyTerminated, GetExitCode());
 }
 
-TEST_F(WorkerThreadTest, SyncTerminate_ImmediatelyAfterStart) {
+// Disabled due to flakiness: https://crbug.com/1003217.
+#if defined(ADDRESS_SANITIZER) || defined(MEMORY_SANITIZER) || \
+    defined(THREAD_SANITIZER)
+#define MAYBE_SyncTerminate_ImmediatelyAfterStart \
+  DISABLED_SyncTerminate_ImmediatelyAfterStart
+#else
+#define MAYBE_SyncTerminate_ImmediatelyAfterStart \
+  SyncTerminate_ImmediatelyAfterStart
+#endif
+TEST_F(WorkerThreadTest, MAYBE_SyncTerminate_ImmediatelyAfterStart) {
   ExpectReportingCallsForWorkerPossiblyTerminatedBeforeInitialization();
   Start();