Fix compile again

base/mac/libdispatch_task_runner.cc

Index: base/mac/libdispatch_task_runner.cc
diff --git a/base/mac/libdispatch_task_runner.cc b/base/mac/libdispatch_task_runner.cc
index adf12619d679c092eb6122abf61f408b3ae8b1e9..dcbeecc08ac60b4284f9d3a0616f0ada4f9c8749 100644
--- a/base/mac/libdispatch_task_runner.cc
+++ b/base/mac/libdispatch_task_runner.cc
@@ -13,7 +13,8 @@ namespace mac {
 
 LibDispatchTaskRunner::LibDispatchTaskRunner(const char* name)
     : queue_(dispatch_queue_create(name, NULL)),
-      queue_finalized_(false, false) {
+      queue_finalized_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+                       base::WaitableEvent::InitialState::NOT_SIGNALED) {
   dispatch_set_context(queue_, this);
   dispatch_set_finalizer_f(queue_, &LibDispatchTaskRunner::Finalizer);
 }