Use WebWidget from the WebKit API. This change also makes...

webkit/api/public/WebPopupMenu.h

Index: webkit/api/public/WebPopupMenu.h
===================================================================
--- webkit/api/public/WebPopupMenu.h	(revision 20851)
+++ webkit/api/public/WebPopupMenu.h	(working copy)
@@ -1,10 +1,10 @@
 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ -14,7 +14,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -31,12 +31,11 @@
 #ifndef WebPopupMenu_h
 #define WebPopupMenu_h
 
-#error "This header file is still a work in progress; do not include!"
-
 #include "WebCommon.h"
 #include "WebWidget.h"
 
 namespace WebKit {
+    class WebWidgetClient;
 
     class WebPopupMenu : public WebWidget {
     public:
@@ -44,3 +43,5 @@
     };
 
 } // namespace WebKit
+
+#endif