Oilpan: Remove ref counting from EventTarget and all uses of Pass/RefPtr<EventTarget>.

Source/core/events/MouseEvent.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 51 matching lines @@
         detail, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),
         event.movementDelta().x(), event.movementDelta().y(),
         event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), event.button(),
         relatedTarget, nullptr, false);
 }
 
 PassRefPtrWillBeRawPtr<MouseEvent> MouseEvent::create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<AbstractView> view,
     int detail, int screenX, int screenY, int pageX, int pageY,
     int movementX, int movementY,
     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button,
-    PassRefPtr<EventTarget> relatedTarget, PassRefPtrWillBeRawPtr<Clipboard> clipboard, bool isSimulated)
+    PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, PassRefPtrWillBeRawPtr<Clipboard> clipboard, bool isSimulated)
 {
     return adoptRefWillBeNoop(new MouseEvent(type, canBubble, cancelable, view,
         detail, screenX, screenY, pageX, pageY,
         movementX, movementY,
         ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget, clipboard, isSimulated));
 }
 
 MouseEvent::MouseEvent()
     : m_button(0)
     , m_buttonDown(false)
 {
     ScriptWrappable::init(this);
 }
 
 MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<AbstractView> view,
     int detail, int screenX, int screenY, int pageX, int pageY,
     int movementX, int movementY,
     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
-    unsigned short button, PassRefPtr<EventTarget> relatedTarget,
+    unsigned short button, PassRefPtrWillBeRawPtr<EventTarget> relatedTarget,
     PassRefPtrWillBeRawPtr<Clipboard> clipboard, bool isSimulated)
     : MouseRelatedEvent(eventType, canBubble, cancelable, view, detail, IntPoint(screenX, screenY),
                         IntPoint(pageX, pageY),
                         IntPoint(movementX, movementY),
                         ctrlKey, altKey, shiftKey, metaKey, isSimulated)
     , m_button(button == (unsigned short)-1 ? 0 : button)
     , m_buttonDown(button != (unsigned short)-1)
     , m_relatedTarget(relatedTarget)
     , m_clipboard(clipboard)
 {
@@ skipping 14 matching lines @@
     initCoordinates(IntPoint(initializer.clientX, initializer.clientY));
 }
 
 MouseEvent::~MouseEvent()
 {
 }
 
 void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<AbstractView> view,
                                 int detail, int screenX, int screenY, int clientX, int clientY,
                                 bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
-                                unsigned short button, PassRefPtr<EventTarget> relatedTarget)
+                                unsigned short button, PassRefPtrWillBeRawPtr<EventTarget> relatedTarget)
 {
     if (dispatched())
         return;
 
     initUIEvent(type, canBubble, cancelable, view, detail);
 
     m_screenLocation = IntPoint(screenX, screenY);
     m_ctrlKey = ctrlKey;
     m_altKey = altKey;
     m_shiftKey = shiftKey;
@@ skipping 48 matching lines @@
 {
     // MSIE extension - "object from which activation or the mouse pointer is exiting during the event" (huh?)
     if (type() != EventTypeNames::mouseout && type() != EventTypeNames::mouseleave)
         return relatedTarget() ? relatedTarget()->toNode() : 0;
 
     return target() ? target()->toNode() : 0;
 }
 
 void MouseEvent::trace(Visitor* visitor)
 {
+    visitor->trace(m_relatedTarget);
     visitor->trace(m_clipboard);
     MouseRelatedEvent::trace(visitor);
 }
 
 PassRefPtrWillBeRawPtr<SimulatedMouseEvent> SimulatedMouseEvent::create(const AtomicString& eventType, PassRefPtrWillBeRawPtr<AbstractView> view, PassRefPtrWillBeRawPtr<Event> underlyingEvent)
 {
     return adoptRefWillBeNoop(new SimulatedMouseEvent(eventType, view, underlyingEvent));
 }
 
 SimulatedMouseEvent::~SimulatedMouseEvent()
@@ skipping 74 matching lines @@
                                      event()->button(), relatedTarget);
     if (event()->defaultHandled())
         doubleClickEvent->setDefaultHandled();
     EventDispatcher::dispatchEvent(dispatcher->node(), MouseEventDispatchMediator::create(doubleClickEvent));
     if (doubleClickEvent->defaultHandled() || doubleClickEvent->defaultPrevented())
         return false;
     return !swallowEvent;
 }
 
 } // namespace WebCore