Delete remaining masks dead code.

sky/engine/core/rendering/RenderImage.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
@@ skipping 91 matching lines @@
         m_imageDevicePixelRatio = 1 / m_imageResource->cachedImage()->devicePixelRatioHeaderValue();
 
     // If the RenderImage was just created we don't have style() or a parent()
     // yet so all we can do is update our intrinsic size. Once we're inserted
     // the resulting layout will do the rest of the work.
     if (!parent()) {
         updateIntrinsicSizeIfNeeded(m_imageResource->intrinsicSize());
         return;
     }
 
-    if (hasBoxDecorationBackground() || hasMask())
+    if (hasBoxDecorationBackground())
         RenderReplaced::imageChanged(newImage, rect);
 
     ASSERT(isRooted());
 
     LayoutSize oldIntrinsicSize = intrinsicSize();
     LayoutSize newIntrinsicSize = m_imageResource->intrinsicSize();
     updateIntrinsicSizeIfNeeded(newIntrinsicSize);
 
     bool imageSourceHasChangedSize = oldIntrinsicSize != newIntrinsicSize;
     if (imageSourceHasChangedSize)
@@ skipping 124 matching lines @@
         return;
     }
 }
 
 bool RenderImage::needsPreferredWidthsRecalculation() const
 {
     return RenderReplaced::needsPreferredWidthsRecalculation();
 }
 
 } // namespace blink