WIP (Introduce WTF::NonNullPtr<T>.)

Source/core/html/HTMLAnchorElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 261 matching lines @@
     ContainerNode::setActive(down, pause);
 }
 
 void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == hrefAttr) {
         bool wasLink = isLink();
         setIsLink(!value.isNull());
         if (wasLink != isLink()) {
             didAffectSelector(AffectedSelectorLink | AffectedSelectorVisited | AffectedSelectorEnabled);
-            if (wasLink && treeScope().adjustedFocusedElement() == this) {
+            if (wasLink && treeScope()->adjustedFocusedElement() == this) {
                 // We might want to call blur(), but it's dangerous to dispatch
                 // events here.
                 document().setNeedsFocusedElementCheck();
             }
         }
         if (isLink()) {
             String parsedURL = stripLeadingAndTrailingHTMLSpaces(value);
             if (document().isDNSPrefetchEnabled()) {
                 if (protocolIs(parsedURL, "http") || protocolIs(parsedURL, "https") || parsedURL.startsWith("//"))
                     prefetchDNS(document().completeURL(parsedURL).host());
@@ skipping 551 matching lines @@
 
     // The precision of current MouseOver trigger is too low to actually trigger preconnects.
     if (motivation == WebKit::WebPreconnectMotivationLinkMouseOver)
         return;
 
     preconnectToURL(url, motivation);
     m_hasIssuedPreconnect = true;
 }
 
 }