Introduce Node::containingTreeScope(), which asserts that the node's root is a tree scope

third_party/WebKit/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 171 matching lines @@
 void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& value)
 {
     if (name == hrefAttr) {
         bool wasLink = isLink();
         setIsLink(!value.isNull());
         if (wasLink || isLink()) {
             pseudoStateChanged(CSSSelector::PseudoLink);
             pseudoStateChanged(CSSSelector::PseudoVisited);
             pseudoStateChanged(CSSSelector::PseudoAnyLink);
         }
-        if (wasLink && !isLink() && treeScope().adjustedFocusedElement() == this) {
+        if (wasLink && !isLink() && adjustedFocusedElementInTreeScope() == 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 187 matching lines @@
 }
 
 Node::InsertionNotificationRequest HTMLAnchorElement::insertedInto(ContainerNode* insertionPoint)
 {
     InsertionNotificationRequest request = HTMLElement::insertedInto(insertionPoint);
     logAddElementIfIsolatedWorldAndInDocument("a", hrefAttr);
     return request;
 }
 
 } // namespace blink