Introduce toHTMLLinkElement

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 3853 matching lines @@
     if (frame()->loader()->state() != FrameStateComplete)
         return KURL();
 
     if (!head())
         return KURL();
 
     RefPtr<HTMLCollection> children = head()->children();
     for (unsigned i = 0; Node* child = children->item(i); i++) {
         if (!child->hasTagName(linkTag))
             continue;
-        HTMLLinkElement* linkElement = static_cast<HTMLLinkElement*>(child);
+        HTMLLinkElement* linkElement = toHTMLLinkElement(child);
         if (!equalIgnoringCase(linkElement->type(), openSearchMIMEType) || !equalIgnoringCase(linkElement->rel(), openSearchRelation))
             continue;
         if (linkElement->href().isEmpty())
             continue;
         return linkElement->href();
     }
 
     return KURL();
 }
 
@@ skipping 249 matching lines @@
 
     if (!head() || !(head()->children()))
         return m_iconURLs;
 
     RefPtr<HTMLCollection> children = head()->children();
     unsigned int length = children->length();
     for (unsigned int i = 0; i < length; ++i) {
         Node* child = children->item(i);
         if (!child->hasTagName(linkTag))
             continue;
-        HTMLLinkElement* linkElement = static_cast<HTMLLinkElement*>(child);
+        HTMLLinkElement* linkElement = toHTMLLinkElement(child);
         if (!(linkElement->iconType() & iconTypesMask))
             continue;
         if (linkElement->href().isEmpty())
             continue;
 
         // Put it at the front to ensure that icons seen later take precedence as required by the spec.
         IconURL newURL(linkElement->href(), linkElement->iconSizes(), linkElement->type(), linkElement->iconType());
         m_iconURLs.prepend(newURL);
     }
 
@@ skipping 1004 matching lines @@
 {
     return DocumentLifecycleNotifier::create(this);
 }
 
 DocumentLifecycleNotifier* Document::lifecycleNotifier()
 {
     return static_cast<DocumentLifecycleNotifier*>(ScriptExecutionContext::lifecycleNotifier());
 }
 
 } // namespace WebCore