Migrate WaitableEvent to enum-based constructor in chrome/

chrome/test/base/ui_test_utils.cc

Index: chrome/test/base/ui_test_utils.cc
diff --git a/chrome/test/base/ui_test_utils.cc b/chrome/test/base/ui_test_utils.cc
index bca013bb75a9f472b054d5f1647b23d37a84270b..5ec957e5f82eb7fc8b3ee8939fb9748f6fe39393 100644
--- a/chrome/test/base/ui_test_utils.cc
+++ b/chrome/test/base/ui_test_utils.cc
@@ -398,8 +398,8 @@ void GetCookies(const GURL& url,
     scoped_refptr<net::URLRequestContextGetter> context_getter =
         contents->GetRenderProcessHost()->GetStoragePartition()->
             GetURLRequestContext();
-    base::WaitableEvent event(true /* manual reset */,
-                              false /* not initially signaled */);
+    base::WaitableEvent event(base::WaitableEvent::ResetPolicy::MANUAL,
+                              base::WaitableEvent::InitialState::NOT_SIGNALED);
     CHECK(content::BrowserThread::PostTask(
         content::BrowserThread::IO, FROM_HERE,
         base::Bind(&GetCookiesOnIOThread, url, context_getter, &event, value)));