Change EXPECT/ASSERT_DCHECK_DEATH macro to not expose the |regex| parameter.

base/task_scheduler/priority_queue_unittest.cc

Index: base/task_scheduler/priority_queue_unittest.cc
diff --git a/base/task_scheduler/priority_queue_unittest.cc b/base/task_scheduler/priority_queue_unittest.cc
index f1e3a0d06eb4842176b4fbada5f2584771e1fc86..3984a2152153f98fb120b8f9c08236786bc7f7e6 100644
--- a/base/task_scheduler/priority_queue_unittest.cc
+++ b/base/task_scheduler/priority_queue_unittest.cc
@@ -138,8 +138,7 @@ TEST(TaskSchedulerPriorityQueueTest, IllegalTwoTransactionsSameThread) {
             pq_a.BeginTransaction();
         std::unique_ptr<PriorityQueue::Transaction> transaction_b =
             pq_b.BeginTransaction();
-      },
-      "");
+      });
 }
 
 // Check that there is no crash when Transactions are created on the same thread