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

third_party/WebKit/Source/web/WebNode.cpp

 /*
  * 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 113 matching lines @@
 bool WebNode::equals(const WebNode& n) const
 {
     return m_private.get() == n.m_private.get();
 }
 
 bool WebNode::lessThan(const WebNode& n) const
 {
     return m_private.get() < n.m_private.get();
 }
 
-WebNode::NodeType WebNode::nodeType() const
-{
-    return static_cast<NodeType>(m_private->nodeType());
-}
-
 WebNode WebNode::parentNode() const
 {
     return WebNode(const_cast<ContainerNode*>(m_private->parentNode()));
 }
 
 WebString WebNode::nodeValue() const
 {
     return m_private->nodeValue();
 }
 
@@ skipping 63 matching lines @@
 bool WebNode::isInsideFocusableElementOrARIAWidget() const
 {
     return AXObject::isInsideFocusableElementOrARIAWidget(*this->constUnwrap<Node>());
 }
 
 bool WebNode::isElementNode() const
 {
     return m_private->isElementNode();
 }
 
+bool WebNode::isDocumentNode() const
+{
+    return m_private->isDocumentNode();
+}
+
 void WebNode::dispatchEvent(const WebDOMEvent& event)
 {
     if (!event.isNull())
         m_private->executionContext()->postSuspendableTask(adoptPtr(new NodeDispatchEventTask(m_private, event)));
 }
 
 void WebNode::simulateClick()
 {
     m_private->executionContext()->postSuspendableTask(adoptPtr(new NodeDispatchSimulatedClickTask(m_private)));
 }
@@ skipping 86 matching lines @@
     m_private = node;
     return *this;
 }
 
 WebNode::operator PassRefPtrWillBeRawPtr<Node>() const
 {
     return m_private.get();
 }
 
 } // namespace blink