Revamp asynchronous (load) event dispatching for SVG elements

Source/core/svg/SVGElement.h

Index: Source/core/svg/SVGElement.h
diff --git a/Source/core/svg/SVGElement.h b/Source/core/svg/SVGElement.h
index f06beabeb2747fae9563bf920436527400b341dd..e835925aff69298f4cabe31b2521bbf75ae5c364 100644
--- a/Source/core/svg/SVGElement.h
+++ b/Source/core/svg/SVGElement.h
@@ -26,7 +26,6 @@
 #include "core/dom/Element.h"
 #include "core/svg/SVGParsingError.h"
 #include "core/svg/properties/SVGPropertyInfo.h"
-#include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
@@ -100,9 +99,6 @@ public:
 
     void sendSVGLoadEventToSelfAndAncestorChainIfPossible();
     bool sendSVGLoadEventIfPossible();
-    void sendSVGLoadEventIfPossibleAsynchronously();
-    void svgLoadEventTimerFired(Timer<SVGElement>*);
-    virtual Timer<SVGElement>* svgLoadEventTimer();
 
     virtual AffineTransform* animateMotionTransform() { return nullptr; }