bindings: Adds virtual ScriptWrappable::wrap method.

Source/core/dom/DOMStringMap.h

Index: Source/core/dom/DOMStringMap.h
diff --git a/Source/core/dom/DOMStringMap.h b/Source/core/dom/DOMStringMap.h
index 35e2eca95fcb6e5941281ddb3c37c256120b6d63..24e137e0549a4f3a9011597f10584ace3a15a395 100644
--- a/Source/core/dom/DOMStringMap.h
+++ b/Source/core/dom/DOMStringMap.h
@@ -39,9 +39,10 @@ namespace blink {
 class Element;
 
 class DOMStringMap : public NoBaseWillBeGarbageCollected<DOMStringMap>, public ScriptWrappable {
-    WTF_MAKE_NONCOPYABLE(DOMStringMap);
-    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
     DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(DOMStringMap);
+    DEFINE_WRAPPERTYPEINFO();
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
+    WTF_MAKE_NONCOPYABLE(DOMStringMap);
 public:
 #if !ENABLE(OILPAN)
     virtual void ref() = 0;