Migrate WaitableEvent to enum-based constructor in chrome/

chrome/test/chromedriver/chrome/adb_impl.cc

Index: chrome/test/chromedriver/chrome/adb_impl.cc
diff --git a/chrome/test/chromedriver/chrome/adb_impl.cc b/chrome/test/chromedriver/chrome/adb_impl.cc
index b177d7dc6b1381ba00b56fe057389e61399b9136..4fa7d249c3d35bb624f9be4bb56008b7fb37c7f6 100644
--- a/chrome/test/chromedriver/chrome/adb_impl.cc
+++ b/chrome/test/chromedriver/chrome/adb_impl.cc
@@ -27,7 +27,9 @@ namespace {
 // callback is run, even if the function that creates the buffer times out.
 class ResponseBuffer : public base::RefCountedThreadSafe<ResponseBuffer> {
  public:
-  ResponseBuffer() : ready_(true, false) {}
+  ResponseBuffer()
+      : ready_(base::WaitableEvent::ResetPolicy::MANUAL,
+               base::WaitableEvent::InitialState::NOT_SIGNALED) {}
 
   void OnResponse(int result, const std::string& response) {
     response_ = response;