Migrate WaitableEvent to enum-based constructor in net/

net/base/keygen_handler_unittest.cc

Index: net/base/keygen_handler_unittest.cc
diff --git a/net/base/keygen_handler_unittest.cc b/net/base/keygen_handler_unittest.cc
index 8c051713fc098b994e09b982aee3247a20a7da0f..f10de0658917595c4835206dd198295abb238759 100644
--- a/net/base/keygen_handler_unittest.cc
+++ b/net/base/keygen_handler_unittest.cc
@@ -202,7 +202,9 @@ TEST_F(KeygenHandlerTest, ConcurrencyTest) {
   std::string results[NUM_HANDLERS];
   for (int i = 0; i < NUM_HANDLERS; i++) {
     std::unique_ptr<KeygenHandler> handler(CreateKeygenHandler());
-    events[i] = new base::WaitableEvent(false, false);
+    events[i] = new base::WaitableEvent(
+        base::WaitableEvent::ResetPolicy::AUTOMATIC,
+        base::WaitableEvent::InitialState::NOT_SIGNALED);
     base::WorkerPool::PostTask(FROM_HERE,
                                base::Bind(ConcurrencyTestCallback,
                                           "some challenge",