Consider intrinsic size for SVG as list-style-image

Source/core/rendering/RenderListMarker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2010 Daniel Bates (dbates@intudata.com)
  *
  * 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
@@ skipping 1359 matching lines @@
     // It's unclear if this is a premature optimization.
     if (!preferredLogicalWidthsDirty())
         return;
 
     m_text = "";
 
     if (isImage()) {
         // FIXME: This is a somewhat arbitrary width.  Generated images for markers really won't become particularly useful
         // until we support the CSS3 marker pseudoclass to allow control over the width and height of the marker box.
         int bulletWidth = style()->fontMetrics().ascent() / 2;
-        m_image->setContainerSizeForRenderer(this, IntSize(bulletWidth, bulletWidth), style()->effectiveZoom());
+        IntSize defaultBulletSize(bulletWidth, bulletWidth);
+        IntSize imageSize = calculateImageIntrinsicDimensions(m_image.get(), defaultBulletSize, DoNotScaleByEffectiveZoom);
+        m_image->setContainerSizeForRenderer(this, imageSize, style()->effectiveZoom());
         return;
     }
 
     EListStyleType type = style()->listStyleType();
     switch (type) {
     case NoneListStyle:
         break;
     case Circle:
     case Disc:
     case Square:
@@ skipping 449 matching lines @@
 
     if (clipToVisibleContent)
         computeRectForRepaint(repaintContainer, rect);
     else
         rect = localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox();
 
     return rect;
 }
 
 } // namespace WebCore