Loosen/improve AtomicFlag semantics.

chrome/browser/after_startup_task_utils.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/after_startup_task_utils.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/lazy_instance.h"
@@ skipping 209 matching lines @@
 }
 
 bool AfterStartupTaskUtils::IsBrowserStartupComplete() {
   return ::IsBrowserStartupComplete();
 }
 
 void AfterStartupTaskUtils::UnsafeResetForTesting() {
   DCHECK(g_after_startup_tasks.Get().empty());
   if (!IsBrowserStartupComplete())
     return;
-  g_startup_complete_flag.Get().UnsafeResetForTesting();
+  g_startup_complete_flag.Get().UnsafeReset();
   DCHECK(!IsBrowserStartupComplete());
 }