DevTools: do not use RAII for sync native breakpoints, reuse AsyncTask where possible.

third_party/WebKit/Source/modules/notifications/Notification.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 362 matching lines @@
                         UseCounter::NotificationPermissionRequestedIframe);
     }
   }
 
   if (!UserGestureIndicator::processingUserGesture()) {
     PerformanceMonitor::reportGenericViolation(
         context, PerformanceMonitor::kDiscouragedAPIUse,
         "Only request notification permission in response to a user gesture.",
         0, nullptr);
   }
-  InspectorInstrumentation::NativeBreakpoint nativeBreakpoint(
-      context, "Notification.requestPermission", true);
+  InspectorInstrumentation::breakIfNeeded(context,
+                                          "Notification.requestPermission");
 
   return NotificationManager::from(context)->requestPermission(
       scriptState, deprecatedCallback);
 }
 
 size_t Notification::maxActions() {
   return kWebNotificationMaxActions;
 }
 
 DispatchEventResult Notification::dispatchEventInternal(Event* event) {
@@ skipping 27 matching lines @@
 }
 
 DEFINE_TRACE(Notification) {
   visitor->trace(m_prepareShowMethodRunner);
   visitor->trace(m_loader);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink