Content-sized resolution should only happen on content-sized tracks

Source/core/rendering/style/GridTrackSize.h

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 76 matching lines @@
 
     void setMinMax(const GridLength& minTrackBreadth, const GridLength& maxTrackBreadth)
     {
         m_type = MinMaxTrackSizing;
         m_minTrackBreadth = minTrackBreadth;
         m_maxTrackBreadth = maxTrackBreadth;
     }
 
     GridTrackSizeType type() const { return m_type; }
 
+    bool isContentSized() const { return m_minTrackBreadth.isContentSized() || m_maxTrackBreadth.isContentSized(); }
+
     bool operator==(const GridTrackSize& other) const
     {
         return m_type == other.m_type && m_minTrackBreadth == other.m_minTrackBreadth && m_maxTrackBreadth == other.m_maxTrackBreadth;
     }
 
     bool hasMinOrMaxContentMinTrackBreadth() const { return minTrackBreadth().isLength() && (minTrackBreadth().length().isMinContent() || minTrackBreadth().length().isMaxContent()); }
     bool hasMaxContentMinTrackBreadth() const { return minTrackBreadth().isLength() && minTrackBreadth().length().isMaxContent(); }
     bool hasMinOrMaxContentMaxTrackBreadth() const { return maxTrackBreadth().isLength() && (maxTrackBreadth().length().isMinContent() || maxTrackBreadth().length().isMaxContent()); }
     bool hasMaxContentMaxTrackBreadth() const { return maxTrackBreadth().isLength() && maxTrackBreadth().length().isMaxContent(); }
 
 private:
     GridTrackSizeType m_type;
     GridLength m_minTrackBreadth;
     GridLength m_maxTrackBreadth;
 };
 
 } // namespace WebCore
 
 #endif // GridTrackSize_h