Migrate WaitableEvent to enum-based constructor in chrome/

chrome/test/chromedriver/net/net_util.cc

Index: chrome/test/chromedriver/net/net_util.cc
diff --git a/chrome/test/chromedriver/net/net_util.cc b/chrome/test/chromedriver/net/net_util.cc
index d8e5b2755ff9cdd8a0daa9e2a88b034cf941f81c..de32f3af88389b9dfe3aacdf0f8d200dad35e18c 100644
--- a/chrome/test/chromedriver/net/net_util.cc
+++ b/chrome/test/chromedriver/net/net_util.cc
@@ -24,7 +24,11 @@ class SyncUrlFetcher : public net::URLFetcherDelegate {
   SyncUrlFetcher(const GURL& url,
                  URLRequestContextGetter* getter,
                  std::string* response)
-      : url_(url), getter_(getter), response_(response), event_(false, false) {}
+      : url_(url),
+        getter_(getter),
+        response_(response),
+        event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+               base::WaitableEvent::InitialState::NOT_SIGNALED) {}
 
   ~SyncUrlFetcher() override {}