Add isHTMLPlugInElement() helpers for consistency with other HTML elements

Source/core/html/HTMLPlugInElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 80 matching lines @@
     // EventTarget functions:
     virtual void removeAllEventListeners() OVERRIDE FINAL;
 
     // Node functions:
     virtual bool canContainRangeEndPoint() const OVERRIDE { return false; }
     virtual bool willRespondToMouseClickEvents() OVERRIDE FINAL;
     virtual void handleLocalEvents(Event*) OVERRIDE FINAL;
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE FINAL;
     virtual void detach(const AttachContext& = AttachContext()) OVERRIDE FINAL;
     virtual void finishParsingChildren() OVERRIDE FINAL;
-    virtual bool isPluginElement() const OVERRIDE FINAL;
 
     // Element functions:
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     virtual void willRecalcStyle(StyleRecalcChange) OVERRIDE FINAL;
     virtual bool supportsFocus() const OVERRIDE FINAL { return true; }
     virtual bool rendererIsFocusable() const OVERRIDE FINAL;
     virtual bool isKeyboardFocusable() const OVERRIDE FINAL;
     virtual void didAddUserAgentShadowRoot(ShadowRoot&) OVERRIDE FINAL;
     virtual void didAddShadowRoot(ShadowRoot&) OVERRIDE FINAL;
 
     // HTMLElement function:
     virtual bool hasCustomFocusLogic() const OVERRIDE;
+    virtual bool isPluginElement() const OVERRIDE FINAL;
 
     // Return any existing RenderWidget without triggering relayout, or 0 if it
     // doesn't yet exist.
     virtual RenderWidget* existingRenderWidget() const = 0;
     virtual void updateWidgetInternal() = 0;
 
     enum DisplayState {
         Restarting,
         RestartingWithPendingMouseClick,
         Playing
     };
     DisplayState displayState() const { return m_displayState; }
     void setDisplayState(DisplayState state) { m_displayState = state; }
     const String loadedMimeType() const;
     bool loadPlugin(const KURL&, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback);
     bool pluginIsLoadable(const KURL&, const String& mimeType);
     bool wouldLoadAsNetscapePlugin(const String& url, const String& serviceType);
 
     mutable RefPtr<SharedPersistent<v8::Object> > m_pluginWrapper;
     NPObject* m_NPObject;
     bool m_isCapturingMouseEvents;
     bool m_inBeforeLoadEventHandler;
     bool m_needsWidgetUpdate;
     bool m_shouldPreferPlugInsForImages;
     DisplayState m_displayState;
 };
 
-DEFINE_ELEMENT_TYPE_CASTS(HTMLPlugInElement, isPluginElement());
+inline bool isHTMLPlugInElement(const Element& element)
+{
+    return element.isHTMLElement() && toHTMLElement(element).isPluginElement();
+}
+
+inline bool isHTMLPlugInElement(const HTMLElement& element)
+{
+    return element.isPluginElement();
+}
+
+DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLPlugInElement);
 
 } // namespace WebCore
 
 #endif // HTMLPlugInElement_h