Oilpan: Move the EventListener hierarchy to Oilpan's heap

Source/modules/netinfo/NetworkInformation.h

 // Copyright 2014 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.
 
 #ifndef NetworkInformation_h
 #define NetworkInformation_h
 
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventTarget.h"
 #include "core/page/NetworkStateNotifier.h"
@@ skipping 14 matching lines @@
     static NetworkInformation* create(ExecutionContext*);
     ~NetworkInformation() override;
 
     String type() const;
 
     void connectionTypeChange(WebConnectionType) override;
 
     // EventTarget overrides.
     const AtomicString& interfaceName() const override;
     ExecutionContext* executionContext() const override;
-    bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false) override;
-    bool removeEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false) override;
+    bool addEventListener(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, bool useCapture = false) override;
+    bool removeEventListener(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, bool useCapture = false) override;
     void removeAllEventListeners() override;
 
     // ActiveDOMObject overrides.
     bool hasPendingActivity() const override;
     void stop() override;
 
     DECLARE_VIRTUAL_TRACE();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(typechange);
 
 private:
     explicit NetworkInformation(ExecutionContext*);
     void startObserving();
     void stopObserving();
 
     // Touched only on context thread.
     WebConnectionType m_type;
 
     // Whether this object is listening for events from NetworkStateNotifier.
     bool m_observing;
 
     // Whether ActiveDOMObject::stop has been called.
     bool m_contextStopped;
 };
 
 } // namespace blink
 
 #endif // NetworkInformation_h