Refactoring: Make LinkStyle instantiation lazy

Source/core/html/HTMLLinkElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved.
  * 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 123 matching lines @@
 
     void dispatchPendingEvent(LinkEventSender*);
     static void dispatchPendingLoadEvents();
 
     // From LinkLoaderClient
     virtual bool shouldLoadLink() OVERRIDE;
 
     // For LinkStyle
     bool loadLink(const String& type, const KURL& url) { return m_linkLoader.loadLink(m_relAttribute, type, url, document()); }
     bool isAlternate() const { return m_link->isUnset() && m_relAttribute.isAlternate(); }
-    bool shouldProcessStyle();
+    bool shouldProcessStyle() { return linkStyleToProcess(); }
 
 private:
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
 
+    LinkStyle* linkStyle() const { return m_link.get(); }
+    LinkStyle* linkStyleToProcess();
+
     void process();
     static void processCallback(Node*);
 
     // From Node and subclassses
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
     virtual bool sheetLoaded() OVERRIDE;
     virtual void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred) OVERRIDE;
     virtual void startLoadingDynamicSheet() OVERRIDE;
@@ skipping 20 matching lines @@
     LinkRelAttribute m_relAttribute;
 
     bool m_createdByParser;
     bool m_isInShadowTree;
     int m_beforeLoadRecurseCount;
 };
 
 } //namespace
 
 #endif