Persistent variants of the GC collection types.

Source/core/css/resolver/ElementStyleResources.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef ElementStyleResources_h
 #define ElementStyleResources_h
 
 #include "CSSPropertyNames.h"
+#include "heap/Handle.h"
 #include "platform/graphics/Color.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 
 namespace WebCore {
 
 class CSSCursorImageValue;
 class CSSImageValue;
 class CSSImageGeneratorValue;
 class CSSImageSetValue;
 class CSSSVGDocumentValue;
 class CSSValue;
 class FilterOperation;
 class StyleImage;
 class TextLinkColors;
 
-typedef HashMap<FilterOperation*, RefPtr<CSSSVGDocumentValue> > PendingSVGDocumentMap;
+typedef WillBePersistentHeapHashMap<FilterOperation*, RefPtrWillBeMember<CSSSVGDocumentValue> > PendingSVGDocumentMap;
 typedef HashMap<CSSPropertyID, RefPtr<CSSValue> > PendingImagePropertyMap;
 
 // Holds information about resources, requested by stylesheets.
 // Lifetime: per-element style resolve.
 class ElementStyleResources {
 WTF_MAKE_NONCOPYABLE(ElementStyleResources);
 public:
     ElementStyleResources();
 
     PassRefPtr<StyleImage> styleImage(const TextLinkColors&, Color currentColor, CSSPropertyID, CSSValue*);
@@ skipping 13 matching lines @@
 
 private:
     PendingImagePropertyMap m_pendingImageProperties;
     PendingSVGDocumentMap m_pendingSVGDocuments;
     float m_deviceScaleFactor;
 };
 
 } // namespace WebCore
 
 #endif // ElementStyleResources_h