Avoid using ImageResource->imageSize() to get the marker size

third_party/WebKit/Source/core/layout/LayoutListMarker.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009 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 40 matching lines @@
 
     bool isInside() const;
 
     void updateMarginsAndContent();
 
     IntRect getRelativeMarkerRect() const;
     LayoutRect localSelectionRect() const;
     bool isImage() const override;
     const StyleImage* image() const { return m_image.get(); }
     const LayoutListItem* listItem() const { return m_listItem; }
+    IntSize imageBulletSize() const;
 
     void listItemStyleDidChange();
 
     const char* name() const override { return "LayoutListMarker"; }
 
 protected:
     void willBeDestroyed() override;
 
 private:
     LayoutListMarker(LayoutListItem*);
@@ skipping 29 matching lines @@
     String m_text;
     RefPtrWillBePersistent<StyleImage> m_image;
     LayoutListItem* m_listItem;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutListMarker, isListMarker());
 
 } // namespace blink
 
 #endif // LayoutListMarker_h