Oilpan: Move the EventListener hierarchy to Oilpan's heap

Source/core/html/ImageDocument.cpp

Index: Source/core/html/ImageDocument.cpp
diff --git a/Source/core/html/ImageDocument.cpp b/Source/core/html/ImageDocument.cpp
index 18ef33d48e0cc0472813dc484e87b921acb8cddd..a34707c26c84e7a99fdb9099125eac134d1b4080 100644
--- a/Source/core/html/ImageDocument.cpp
+++ b/Source/core/html/ImageDocument.cpp
@@ -56,7 +56,10 @@ using namespace HTMLNames;
 
 class ImageEventListener : public EventListener {
 public:
-    static PassRefPtr<ImageEventListener> create(ImageDocument* document) { return adoptRef(new ImageEventListener(document)); }
+    static PassRefPtrWillBeRawPtr<ImageEventListener> create(ImageDocument* document)
+    {
+        return adoptRefWillBeNoop(new ImageEventListener(document));
+    }
     static const ImageEventListener* cast(const EventListener* listener)
     {
         return listener->type() == ImageEventListenerType
@@ -66,6 +69,12 @@ public:
 
     virtual bool operator==(const EventListener& other);
 
+    DEFINE_INLINE_VIRTUAL_TRACE()
+    {
+        visitor->trace(m_doc);
+        EventListener::trace(visitor);
+    }
+
 private:
     ImageEventListener(ImageDocument* document)
         : EventListener(ImageEventListenerType)
@@ -75,7 +84,7 @@ private:
 
     virtual void handleEvent(ExecutionContext*, Event*);
 
-    ImageDocument* m_doc;
+    RawPtrWillBeMember<ImageDocument> m_doc;
 };
 
 class ImageDocumentParser : public RawDataDocumentParser {
@@ -227,7 +236,7 @@ void ImageDocument::createDocumentStructure(bool loadingMultipartContent)
 
     if (shouldShrinkToFit()) {
         // Add event listeners
-        RefPtr<EventListener> listener = ImageEventListener::create(this);
+        RefPtrWillBeRawPtr<EventListener> listener = ImageEventListener::create(this);
         if (LocalDOMWindow* domWindow = this->domWindow())
             domWindow->addEventListener("resize", listener, false);
         if (m_shrinkToFitMode == Desktop)