iPhone 5c marketing site repaints incorrectly with layer squashing

LayoutTests/compositing/squashing/repaint-via-layout-offset-expected.txt

 (GraphicsLayer
   (bounds 800.00 600.00)
   (children 1
     (GraphicsLayer
       (bounds 800.00 600.00)
       (contentsOpaque 1)
       (drawsContent 1)
       (children 1
         (GraphicsLayer
           (children 2
             (GraphicsLayer
               (position 8.00 8.00)
               (bounds 200.00 200.00)
               (contentsOpaque 1)
               (drawsContent 1)
-              (backgroundColor #FA8072)
+              (backgroundColor #ADD8E6)
             )
             (GraphicsLayer
-              (position 8.00 8.00)
-              (bounds 100.00 100.00)
+              (position 50.00 50.00)
+              (bounds 50.00 50.00)
               (drawsContent 1)
               (repaint rects
-                (rect 0.00 0.00 100.00 100.00)
-                (rect 0.00 0.00 100.00 100.00)
+                (rect 0.00 0.00 40.00 40.00)
+                (rect 0.00 0.00 50.00 50.00)
               )
             )
           )
         )
       )
     )
   )
 )