iPhone 5c marketing site repaints incorrectly with layer squashing

Source/platform/geometry/LayoutRect.cpp

 /*
  * 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 102 matching lines @@
     m_size.scale(s);
 }
 
 void LayoutRect::scale(float xAxisScale, float yAxisScale)
 {
     m_location.scale(xAxisScale, yAxisScale);
     m_size.scale(xAxisScale, yAxisScale);
 }
 
 #ifndef NDEBUG
-void LayoutRect::show(bool showRawValue)
+void LayoutRect::show(bool showRawValue) const
 {
     if (showRawValue)
         printf("Rect (in raw layout units): [x=%d y=%d maxX=%d maxY=%d]\n", x().rawValue(), y().rawValue(), maxX().rawValue(), maxY().rawValue());
     else
         printf("Rect (in pixels): [x=%lf y=%lf maxX=%lf maxY=%lf]\n", x().toDouble(), y().toDouble(), maxX().toDouble(), maxY().toDouble());
 }
 #endif
 
 LayoutRect unionRect(const Vector<LayoutRect>& rects)
 {
@@ skipping 15 matching lines @@
 }
 
 LayoutRect enclosingLayoutRect(const FloatRect& rect)
 {
     LayoutPoint location = flooredLayoutPoint(rect.minXMinYCorner());
     LayoutPoint maxPoint = ceiledLayoutPoint(rect.maxXMaxYCorner());
     return LayoutRect(location, maxPoint - location);
 }
 
 } // namespace WebCore