HTML Imports: styles in removed imports should be applied when it comes back

Source/core/html/HTMLLinkElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Rob Buis (rwlbuis@gmail.com)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 252 matching lines @@
     if (!insertionPoint->inDocument())
         return InsertionDone;
 
     m_isInShadowTree = isInShadowTree();
     if (m_isInShadowTree)
         return InsertionDone;
 
     document().styleEngine()->addStyleSheetCandidateNode(this, m_createdByParser);
 
     process();
+
+    if (m_link)
+        m_link->ownerInserted();
+
     return InsertionDone;
 }
 
 void HTMLLinkElement::removedFrom(ContainerNode* insertionPoint)
 {
     HTMLElement::removedFrom(insertionPoint);
     if (!insertionPoint->inDocument())
         return;
 
     m_linkLoader.released();
@@ skipping 426 matching lines @@
         removePendingSheet();
 }
 
 void LinkStyle::trace(Visitor* visitor)
 {
     visitor->trace(m_sheet);
     LinkResource::trace(visitor);
 }
 
 } // namespace WebCore