Make SVG images for custom CSS cursors appear sharp on retina displays

Source/core/css/CSSCursorImageValue.cpp

 /*
  * Copyright (C) 2006 Rob Buis <buis@kde.org>
  *           (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2008 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 126 matching lines @@
                 StyleFetchedImage* cachedImage = svgImageValue->cachedImage(loader);
                 m_image = cachedImage;
                 return cachedImage;
             }
         }
 
         if (m_imageValue->isImageValue())
             m_image = toCSSImageValue(m_imageValue.get())->cachedImage(loader);
     }
 
-    if (m_image && m_image->isImageResource())
-        return toStyleFetchedImage(m_image);
+    if (m_image && m_image->isImageResource()) {
+        StyleFetchedImage* fetched = toStyleFetchedImage(m_image);
+        ImageResource* resource = fetched->cachedImage();
+        if (resource)
+            resource->setDeviceScaleFactor(deviceScaleFactor);
+        return fetched;
+    }
     return 0;
 }
 
 StyleImage* CSSCursorImageValue::cachedOrPendingImage(float deviceScaleFactor)
 {
     // Need to delegate completely so that changes in device scale factor can be handled appropriately.
     if (m_imageValue->isImageSetValue())
         return toCSSImageSetValue(m_imageValue.get())->cachedOrPendingImageSet(deviceScaleFactor);
 
     if (!m_image)
@@ skipping 30 matching lines @@
     m_referencedElements.remove(element);
 }
 
 bool CSSCursorImageValue::equals(const CSSCursorImageValue& other) const
 {
     return m_hasHotSpot ? other.m_hasHotSpot && m_hotSpot == other.m_hotSpot : !other.m_hasHotSpot
         && compareCSSValuePtr(m_imageValue, other.m_imageValue);
 }
 
 } // namespace WebCore