Make WebNode::to<Type>() (and toConst) casts contain type asserts.

third_party/WebKit/public/web/WebInputElement.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 21 matching lines @@
 #define WebInputElement_h
 
 #include "WebFormControlElement.h"
 
 namespace blink {
 
 class HTMLInputElement;
 class WebElementCollection;
 
 // Provides readonly access to some properties of a DOM input element node.
-class WebInputElement : public WebFormControlElement {
+class WebInputElement final : public WebFormControlElement {
 public:
     WebInputElement() : WebFormControlElement() { }
     WebInputElement(const WebInputElement& element) : WebFormControlElement(element) { }
 
     WebInputElement& operator=(const WebInputElement& element)
     {
         WebFormControlElement::assign(element);
         return *this;
     }
     void assign(const WebInputElement& element) { WebFormControlElement::assign(element); }
@@ skipping 31 matching lines @@
     // If true, forces the text of the element to be visible.
     BLINK_EXPORT void setShouldRevealPassword(bool value);
 
 #if BLINK_IMPLEMENTATION
     WebInputElement(const PassRefPtrWillBeRawPtr<HTMLInputElement>&);
     WebInputElement& operator=(const PassRefPtrWillBeRawPtr<HTMLInputElement>&);
     operator PassRefPtrWillBeRawPtr<HTMLInputElement>() const;
 #endif
 };
 
+DECLARE_WEB_NODE_TYPE_CASTS(WebInputElement);
+
 // This returns 0 if the specified WebElement is not a WebInputElement.
 BLINK_EXPORT WebInputElement* toWebInputElement(WebElement*);
 // This returns 0 if the specified WebElement is not a WebInputElement.
 inline const WebInputElement* toWebInputElement(const WebElement* element)
 {
     return toWebInputElement(const_cast<WebElement*>(element));
 }
 
 } // namespace blink
 
 #endif