Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/svg/SVGDocument.cpp

Index: Source/core/svg/SVGDocument.cpp
diff --git a/Source/core/svg/SVGDocument.cpp b/Source/core/svg/SVGDocument.cpp
index a32718fe9014eff4f82c05eca98702579f6106f4..10ac8e685b6e47d164fe2316b75331324053274f 100644
--- a/Source/core/svg/SVGDocument.cpp
+++ b/Source/core/svg/SVGDocument.cpp
@@ -51,7 +51,7 @@ SVGSVGElement* SVGDocument::rootElement() const
 
 void SVGDocument::dispatchZoomEvent(float prevScale, float newScale)
 {
-    RefPtr<SVGZoomEvent> event = SVGZoomEvent::create();
+    RefPtrWillBeRawPtr<SVGZoomEvent> event = SVGZoomEvent::create();
     event->initEvent(EventTypeNames::zoom, true, false);
     event->setPreviousScale(prevScale);
     event->setNewScale(newScale);
@@ -60,7 +60,7 @@ void SVGDocument::dispatchZoomEvent(float prevScale, float newScale)
 
 void SVGDocument::dispatchScrollEvent()
 {
-    RefPtr<Event> event = Event::create();
+    RefPtrWillBeRawPtr<Event> event = Event::create();
     event->initEvent(EventTypeNames::scroll, true, false);
     rootElement()->dispatchEvent(event.release(), IGNORE_EXCEPTION);
 }