Migrate WaitableEvent to enum-based constructor in base/

base/profiler/stack_sampling_profiler.cc

Index: base/profiler/stack_sampling_profiler.cc
diff --git a/base/profiler/stack_sampling_profiler.cc b/base/profiler/stack_sampling_profiler.cc
index 82e454ddc4d83cd38a38fc7beb324286e2af2fb9..3d4979ca0bf49b9541737e23b4584e7d8b49c69a 100644
--- a/base/profiler/stack_sampling_profiler.cc
+++ b/base/profiler/stack_sampling_profiler.cc
@@ -120,7 +120,8 @@ StackSamplingProfiler::SamplingThread::SamplingThread(
     const CompletedCallback& completed_callback)
     : native_sampler_(std::move(native_sampler)),
       params_(params),
-      stop_event_(false, false),
+      stop_event_(WaitableEvent::ResetPolicy::AUTOMATIC,
+                  WaitableEvent::InitialState::NOT_SIGNALED),
       completed_callback_(completed_callback) {}
 
 StackSamplingProfiler::SamplingThread::~SamplingThread() {}