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

Source/core/platform/graphics/BitmapImage.cpp

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 332 matching lines @@
     return m_source.frameIsCompleteAtIndex(index);
 }
 
 float BitmapImage::frameDurationAtIndex(size_t index)
 {
     if (index < m_frames.size() && m_frames[index].m_haveMetadata)
         return m_frames[index].m_duration;
     return m_source.frameDurationAtIndex(index);
 }
 
-PassRefPtr<NativeImageSkia> BitmapImage::nativeImageForCurrentFrame()
+PassRefPtr<NativeImageSkia> BitmapImage::nativeImageForCurrentFrame(ScaleHint hint)
 {
     return frameAtIndex(currentFrame());
 }
 
 bool BitmapImage::frameHasAlphaAtIndex(size_t index)
 {
     if (m_frames.size() <= index)
         return true;
 
     if (m_frames[index].m_haveMetadata)
@@ skipping 239 matching lines @@
     }
     return m_isSolidColor && !m_currentFrame;
 }
 
 Color BitmapImage::solidColor() const
 {
     return m_solidColor;
 }
 
 }