bindings: Adds virtual ScriptWrappable::wrap method.

Source/core/html/HTMLKeygenElement.h

Index: Source/core/html/HTMLKeygenElement.h
diff --git a/Source/core/html/HTMLKeygenElement.h b/Source/core/html/HTMLKeygenElement.h
index f0069036cd278753d43bfe8ae6a28dd6f3764567..0d5559bad596e5e19d43dbee6e7cf25088b0009a 100644
--- a/Source/core/html/HTMLKeygenElement.h
+++ b/Source/core/html/HTMLKeygenElement.h
@@ -31,6 +31,7 @@ namespace blink {
 class HTMLSelectElement;
 
 class HTMLKeygenElement FINAL : public HTMLFormControlElementWithState {
+    DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<HTMLKeygenElement> create(Document&, HTMLFormElement*);
 
@@ -62,6 +63,6 @@ private:
     HTMLSelectElement* shadowSelect() const;
 };
 
-} //namespace
+} // namespace blink
 
-#endif
+#endif // HTMLKeygenElement_h