Marks TestEvalOnCallFrame, TestSetBreakpoint, QueuedSharedWorkerShutdown as flaky.

chrome/worker/worker_uitest.cc

Index: chrome/worker/worker_uitest.cc
diff --git a/chrome/worker/worker_uitest.cc b/chrome/worker/worker_uitest.cc
index fc7c276fe2296d144aafb53e90137a4669f30dc5..7eb7a45da1016140b3dcebd88acb9bb64cafbd65 100644
--- a/chrome/worker/worker_uitest.cc
+++ b/chrome/worker/worker_uitest.cc
@@ -556,7 +556,7 @@ TEST_F(WorkerTest, WorkerClose) {
 }
 
 // http://crbug.com/42641
-TEST_F(WorkerTest, DISABLED_QueuedSharedWorkerShutdown) {
+TEST_F(WorkerTest, FLAKY_QueuedSharedWorkerShutdown) {
   // Tests to make sure that queued shared workers are started up when
   // shared workers shut down.
   int max_workers_per_tab = WorkerService::kMaxWorkersPerTabWhenSeparate;