Oilpan: Move the EventListener hierarchy to Oilpan's heap

Source/core/svg/SVGElement.cpp

Index: Source/core/svg/SVGElement.cpp
diff --git a/Source/core/svg/SVGElement.cpp b/Source/core/svg/SVGElement.cpp
index 2d6da729a048710981647cb9bd5fb399ca4d80d3..a09193ca95954cf373245abc1afb38d7723f5364 100644
--- a/Source/core/svg/SVGElement.cpp
+++ b/Source/core/svg/SVGElement.cpp
@@ -741,9 +741,9 @@ static inline void collectInstancesForSVGElement(SVGElement* element, WillBeHeap
     instances = element->instancesForElement();
 }
 
-bool SVGElement::addEventListener(const AtomicString& eventType, PassRefPtr<EventListener> prpListener, bool useCapture)
+bool SVGElement::addEventListener(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener> prpListener, bool useCapture)
 {
-    RefPtr<EventListener> listener = prpListener;
+    RefPtrWillBeRawPtr<EventListener> listener = prpListener;
 
     // Add event listener to regular DOM element
     if (!Node::addEventListener(eventType, listener, useCapture))
@@ -760,9 +760,9 @@ bool SVGElement::addEventListener(const AtomicString& eventType, PassRefPtr<Even
     return true;
 }
 
-bool SVGElement::removeEventListener(const AtomicString& eventType, PassRefPtr<EventListener> prpListener, bool useCapture)
+bool SVGElement::removeEventListener(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener> prpListener, bool useCapture)
 {
-    RefPtr<EventListener> listener = prpListener;
+    RefPtrWillBeRawPtr<EventListener> listener = prpListener;
 
     // Remove event listener from regular DOM element
     if (!Node::removeEventListener(eventType, listener, useCapture))
@@ -786,9 +786,11 @@ static bool hasLoadListener(Element* element)
         return true;
 
     for (element = element->parentOrShadowHostElement(); element; element = element->parentOrShadowHostElement()) {
-        const EventListenerVector& entry = element->getEventListeners(EventTypeNames::load);
-        for (size_t i = 0; i < entry.size(); ++i) {
-            if (entry[i].useCapture)
+        EventListenerVector* entry = element->getEventListeners(EventTypeNames::load);
+        if (!entry)
+            continue;
+        for (size_t i = 0; i < entry->size(); ++i) {
+            if (entry->at(i).useCapture)
                 return true;
         }
     }