Fix regression calling unique methods for the first time on plugin objects. b=536116 r=josh

dom/base/nsDOMClassInfo.cpp

@@ -9802,6 +9802,22 @@ nsHTMLPluginObjElementSH::GetPluginJSObject(JSContext *cx, JSObject *obj,
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsHTMLPluginObjElementSH::NewResolve(nsIXPConnectWrappedNative *wrapper,
+                                     JSContext *cx, JSObject *obj, jsval id,
+                                     PRUint32 flags, JSObject **objp,
+                                     PRBool *_retval)
+{
+  // Make sure the plugin instance is loaded and instantiated, if
+  // possible.
+
+  nsCOMPtr<nsIPluginInstance> pi;
+  nsresult rv = GetPluginInstanceIfSafe(wrapper, obj, getter_AddRefs(pi));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return nsElementSH::NewResolve(wrapper, cx, obj, id, flags, objp,
+                                 _retval);
+}
  
 // HTMLOptionsCollection helper
 

dom/base/nsDOMClassInfo.h

@@ -1112,6 +1112,9 @@ protected:
                                     JSObject **plugin_proto);
 
 public:
+  NS_IMETHOD NewResolve(nsIXPConnectWrappedNative *wrapper, JSContext *cx,
+                        JSObject *obj, jsval id, PRUint32 flags,
+                        JSObject **objp, PRBool *_retval);
   NS_IMETHOD PreCreate(nsISupports *nativeObj, JSContext *cx,
                        JSObject *globalObj, JSObject **parentObj);
   NS_IMETHOD PostCreate(nsIXPConnectWrappedNative *wrapper, JSContext *cx,