[bindings] Avoid using custom bindings for handling clipboardData on Event idl interface.

Source/core/events/ClipboardEvent.h

Index: Source/core/events/ClipboardEvent.h
diff --git a/Source/core/events/ClipboardEvent.h b/Source/core/events/ClipboardEvent.h
index 28cfa3757dd2d53bd89fb8b21d4f3d8393af6e87..2de1ecc1dd506af8c56bef73cb792ba90fd8bd2a 100644
--- a/Source/core/events/ClipboardEvent.h
+++ b/Source/core/events/ClipboardEvent.h
@@ -24,15 +24,19 @@
 #ifndef ClipboardEvent_h
 #define ClipboardEvent_h
 
+#include "core/clipboard/DataTransfer.h"
 #include "core/events/Event.h"
 
 namespace blink {
 
-class DataTransfer;
-
 class ClipboardEvent final : public Event {
+    DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~ClipboardEvent();
+    static PassRefPtrWillBeRawPtr<ClipboardEvent> create()
+    {
+        return adoptRefWillBeNoop(new ClipboardEvent());
+    }
 
     static PassRefPtrWillBeRawPtr<ClipboardEvent> create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<DataTransfer> dataTransfer)
     {