Move Image ownership out of CSSValue

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 "core/CSSPropertyNames.h"
+#include "core/style/StyleImage.h"
 #include "platform/graphics/Color.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class CSSCursorImageValue;
 class CSSImageValue;
 class CSSImageGeneratorValue;
@@ skipping 17 matching lines @@
 
     PassRefPtrWillBeRawPtr<StyleImage> styleImage(Document&, CSSPropertyID, CSSValue*);
 
     PassRefPtrWillBeRawPtr<StyleImage> generatedOrPendingFromValue(CSSPropertyID, CSSImageGeneratorValue*);
     PassRefPtrWillBeRawPtr<StyleImage> cachedOrPendingFromValue(Document&, CSSPropertyID, CSSImageValue*);
     PassRefPtrWillBeRawPtr<StyleImage> setOrPendingFromValue(CSSPropertyID, CSSImageSetValue*);
     PassRefPtrWillBeRawPtr<StyleImage> cursorOrPendingFromValue(CSSPropertyID, CSSCursorImageValue*);
 
     const PendingImagePropertyMap& pendingImageProperties() const { return m_pendingImageProperties; }
     const PendingSVGDocumentMap& pendingSVGDocuments() const { return m_pendingSVGDocuments; }
+    const CSSStyleImageMap& cssImages() const { return m_cssImages; }
+    CSSStyleImageMap& mutableCssImages() { return m_cssImages; }
 
     void clearPendingImageProperties();
     void clearPendingSVGDocuments();
+    void clearCSSImages();
 
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
     void setDeviceScaleFactor(float deviceScaleFactor) { m_deviceScaleFactor = deviceScaleFactor; }
 
     void addPendingSVGDocument(FilterOperation*, CSSSVGDocumentValue*);
 
 private:
     PendingImagePropertyMap m_pendingImageProperties;
     PendingSVGDocumentMap m_pendingSVGDocuments;
+
+    // A list of all the images referenced by CSS
+    CSSStyleImageMap m_cssImages;
+
     float m_deviceScaleFactor;
 };
 
 } // namespace blink
 
 #endif // ElementStyleResources_h