Add default constructor for rtc::Event

Bug: webrtc:9962
Change-Id: Icaa91e657e6881fcb1553f354c07866109a0ea68
Reviewed-on: https://webrtc-review.googlesource.com/c/109500
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25535}
diff --git a/rtc_base/task_queue_for_test.h b/rtc_base/task_queue_for_test.h
index 70c58fb..9162e81 100644
--- a/rtc_base/task_queue_for_test.h
+++ b/rtc_base/task_queue_for_test.h
@@ -33,7 +33,7 @@
   template <class Closure>
   void SendTask(Closure* task) {
     RTC_DCHECK(!IsCurrent());
-    rtc::Event event(false, false);
+    rtc::Event event;
     PostTask(rtc::NewClosure(
         [&task]() {
           RTC_CHECK_EQ(false, static_cast<QueuedTask*>(task)->Run());
@@ -47,7 +47,7 @@
   template <class Closure>
   void SendTask(Closure&& task) {
     RTC_DCHECK(!IsCurrent());
-    rtc::Event event(false, false);
+    rtc::Event event;
     PostTask(rtc::NewClosure(std::move(task), [&event]() { event.Set(); }));
     event.Wait(rtc::Event::kForever);
   }