Oilpan: trace Event.currentTarget.

Source/core/events/Event.cpp

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 29 matching lines @@
 
 Event::Event()
     : m_canBubble(false)
     , m_cancelable(false)
     , m_propagationStopped(false)
     , m_immediatePropagationStopped(false)
     , m_defaultPrevented(false)
     , m_defaultHandled(false)
     , m_cancelBubble(false)
     , m_eventPhase(0)
-    , m_currentTarget(0)
+    , m_currentTarget(nullptr)
     , m_createTime(convertSecondsToDOMTimeStamp(currentTime()))
 {
     ScriptWrappable::init(this);
 }
 
 Event::Event(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg)
     : m_type(eventType)
     , m_canBubble(canBubbleArg)
     , m_cancelable(cancelableArg)
     , m_propagationStopped(false)
     , m_immediatePropagationStopped(false)
     , m_defaultPrevented(false)
     , m_defaultHandled(false)
     , m_cancelBubble(false)
     , m_eventPhase(0)
-    , m_currentTarget(0)
+    , m_currentTarget(nullptr)
     , m_createTime(convertSecondsToDOMTimeStamp(currentTime()))
 {
     ScriptWrappable::init(this);
 }
 
 Event::Event(const AtomicString& eventType, const EventInit& initializer)
     : m_type(eventType)
     , m_canBubble(initializer.bubbles)
     , m_cancelable(initializer.cancelable)
     , m_propagationStopped(false)
     , m_immediatePropagationStopped(false)
     , m_defaultPrevented(false)
     , m_defaultHandled(false)
     , m_cancelBubble(false)
     , m_eventPhase(0)
-    , m_currentTarget(0)
+    , m_currentTarget(nullptr)
     , m_createTime(convertSecondsToDOMTimeStamp(currentTime()))
 {
     ScriptWrappable::init(this);
 }
 
 Event::~Event()
 {
 }
 
 void Event::initEvent(const AtomicString& eventTypeArg, bool canBubbleArg, bool cancelableArg)
@@ skipping 148 matching lines @@
     Node* node = m_currentTarget->toNode();
     if (node && node->isSVGElement()) {
         if (SVGElement* svgElement = toSVGElement(node)->correspondingElement())
             return svgElement;
     }
     return m_currentTarget;
 }
 
 void Event::trace(Visitor* visitor)
 {
+    visitor->trace(m_currentTarget);
     visitor->trace(m_target);
     visitor->trace(m_underlyingEvent);
     visitor->trace(m_eventPath);
 }
 
 } // namespace WebCore