Move StyleSheet to the oilpan heap using transition types.

Source/core/xml/XSLStyleSheet.h

 /*
  * This file is part of the XSL implementation.
  *
  * Copyright (C) 2004, 2006, 2008, 2012 Apple 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 20 matching lines @@
 #include <libxml/tree.h>
 #include <libxslt/transform.h>
 
 namespace WebCore {
 
 class ResourceFetcher;
 class XSLImportRule;
 
 class XSLStyleSheet FINAL : public StyleSheet {
 public:
-    static PassRefPtr<XSLStyleSheet> create(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL)
+    static PassRefPtrWillBeRawPtr<XSLStyleSheet> create(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL)
     {
         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
-        return adoptRef(new XSLStyleSheet(parentImport, originalURL, finalURL));
+        return adoptRefWillBeRefCountedGarbageCollected(new XSLStyleSheet(parentImport, originalURL, finalURL));
     }
-    static PassRefPtr<XSLStyleSheet> create(ProcessingInstruction* parentNode, const String& originalURL, const KURL& finalURL)
+    static PassRefPtrWillBeRawPtr<XSLStyleSheet> create(ProcessingInstruction* parentNode, const String& originalURL, const KURL& finalURL)
     {
         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
-        return adoptRef(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
+        return adoptRefWillBeRefCountedGarbageCollected(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
     }
-    static PassRefPtr<XSLStyleSheet> createEmbedded(ProcessingInstruction* parentNode, const KURL& finalURL)
+    static PassRefPtrWillBeRawPtr<XSLStyleSheet> createEmbedded(ProcessingInstruction* parentNode, const KURL& finalURL)
     {
         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
-        return adoptRef(new XSLStyleSheet(parentNode, finalURL.string(), finalURL, true));
+        return adoptRefWillBeRefCountedGarbageCollected(new XSLStyleSheet(parentNode, finalURL.string(), finalURL, true));
     }
 
     // Taking an arbitrary node is unsafe, because owner node pointer can become stale.
     // XSLTProcessor ensures that the stylesheet doesn't outlive its parent, in part by not exposing it to JavaScript.
-    static PassRefPtr<XSLStyleSheet> createForXSLTProcessor(Node* parentNode, const String& originalURL, const KURL& finalURL)
+    static PassRefPtrWillBeRawPtr<XSLStyleSheet> createForXSLTProcessor(Node* parentNode, const String& originalURL, const KURL& finalURL)
     {
         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
-        return adoptRef(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
+        return adoptRefWillBeRefCountedGarbageCollected(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
     }
 
     virtual ~XSLStyleSheet();
 
     bool parseString(const String&);
 
     void checkLoaded();
 
     const KURL& finalURL() const { return m_finalURL; }
 
@@ skipping 19 matching lines @@
     virtual bool disabled() const OVERRIDE { return m_isDisabled; }
     virtual void setDisabled(bool b) OVERRIDE { m_isDisabled = b; }
     virtual Node* ownerNode() const OVERRIDE { return m_ownerNode; }
     virtual String href() const OVERRIDE { return m_originalURL; }
     virtual String title() const OVERRIDE { return emptyString(); }
 
     virtual void clearOwnerNode() OVERRIDE { m_ownerNode = 0; }
     virtual KURL baseURL() const OVERRIDE { return m_finalURL; }
     virtual bool isLoading() const OVERRIDE;
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 private:
     XSLStyleSheet(Node* parentNode, const String& originalURL, const KURL& finalURL, bool embedded);
     XSLStyleSheet(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL);
 
     Node* m_ownerNode;
     String m_originalURL;
     KURL m_finalURL;
     bool m_isDisabled;
 
     Vector<OwnPtr<XSLImportRule> > m_children;
 
     bool m_embedded;
     bool m_processed;
 
     xmlDocPtr m_stylesheetDoc;
     bool m_stylesheetDocTaken;
     bool m_compilationFailed;
 
     XSLStyleSheet* m_parentStyleSheet;

[haraken, 2014/03/05 14:21:22]

Shouldn't we use RawPtrWillBeMember<XSLStyleSheet> ?

[Mads Ager (chromium), 2014/03/05 14:51:16]

Yes, in one of the next changes. When I remove the RefPtrs we will need to get
these right.

 };
 
 DEFINE_TYPE_CASTS(XSLStyleSheet, StyleSheet, sheet, !sheet->isCSSStyleSheet(), !sheet.isCSSStyleSheet());
 
 } // namespace WebCore
 
 #endif // XSLStyleSheet_h