Make classes and structures in core/xml, core/input, core/imagebitmap and core/Init fast-allocated.

Source/core/input/EventHandler.h

Index: Source/core/input/EventHandler.h
diff --git a/Source/core/input/EventHandler.h b/Source/core/input/EventHandler.h
index 6dbda0c2b8892594b8ac78757a01ea19118fe812..0d3d60b0608197d263d93177d0dd0146e6583daf 100644
--- a/Source/core/input/EventHandler.h
+++ b/Source/core/input/EventHandler.h
@@ -84,8 +84,9 @@ class Widget;
 
 enum class DragInitiator;
 
-class CORE_EXPORT EventHandler : public NoBaseWillBeGarbageCollectedFinalized<EventHandler> {
+class CORE_EXPORT EventHandler final : public NoBaseWillBeGarbageCollectedFinalized<EventHandler> {
     WTF_MAKE_NONCOPYABLE(EventHandler);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(EventHandler);
 public:
     explicit EventHandler(LocalFrame*);
     ~EventHandler();