Cleanup: Add conversion interface for WebWidget derived classes.

public/web/WebWidget.h

 /*
  * 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
@@ skipping 202 matching lines @@
     // on failure.
     virtual bool caretOrSelectionRange(size_t* location, size_t* length) { return false; }
 
     // Changes the text direction of the selected input node.
     virtual void setTextDirection(WebTextDirection) { }
 
     // Returns true if the WebWidget uses GPU accelerated compositing
     // to render its contents.
     virtual bool isAcceleratedCompositingActive() const { return false; }
 
+    // Returns true if the WebWidget created is of type WebPagePopup.
+    virtual bool isPagePopup() const { return false; }
+    // Returns true if the WebWidget created is of type WebPopupMenu.
+    virtual bool isPopupMenu() const { return false; }
+    // Returns true if the WebWidget created is of type WebHelperPlugin.
+    virtual bool isHelperPlugin() const { return false; }
+
     // The WebLayerTreeView initialized on this WebWidgetClient will be going away and
     // is no longer safe to access.
     virtual void willCloseLayerTreeView() { }
 
     // Calling WebWidgetClient::requestPointerLock() will result in one
     // return call to didAcquirePointerLock() or didNotAcquirePointerLock().
     virtual void didAcquirePointerLock() { }
     virtual void didNotAcquirePointerLock() { }
 
     // Pointer lock was held, but has been lost. This may be due to a
@@ skipping 11 matching lines @@
     // content.
     virtual WebColor backgroundColor() const { return 0xFFFFFFFF; /* SK_ColorWHITE */ }
 
 protected:
     ~WebWidget() { }
 };
 
 } // namespace WebKit
 
 #endif