Auto-rebaseline for r168335

LayoutTests/platform/mac/virtual/softwarecompositing/geometry/preserve-3d-switching-expected.txt

 The green box appear angled out from the yellow box and embedded in it.
 
 -webkit-transform: translateZ(-100px) rotateY(45deg);
 (GraphicsLayer
   (bounds 800.00 600.00)
   (children 1
     (GraphicsLayer
       (bounds 800.00 600.00)
       (contentsOpaque 1)
       (drawsContent 1)
       (children 1
         (GraphicsLayer
           (position 108.00 73.00)
           (bounds 304.00 304.00)
           (children 1
             (GraphicsLayer
               (bounds 304.00 304.00)
               (shouldFlattenTransform 0)
               (transform [1.00 0.00 0.00 0.00] [0.00 1.00 0.00 0.00] [0.00 0.00 1.00 -0.00] [0.00 0.00 0.00 1.00])
               (children 1
                 (GraphicsLayer
                   (position 12.00 12.00)
                   (bounds 280.00 280.00)
                   (opacity 0.80)
                   (contentsOpaque 1)
                   (shouldFlattenTransform 0)
                   (3dRenderingContext 1)
-                  (drawsContent 1)
-                  (backgroundColor #FFFF00)
                   (transform [0.77 -0.56 -0.32 0.00] [0.00 0.50 -0.87 0.00] [0.64 0.66 0.38 0.00] [0.00 0.00 0.00 1.00])
                   (children 1
                     (GraphicsLayer
                       (position 40.00 40.00)
                       (bounds 200.00 200.00)
                       (opacity 0.70)
                       (contentsOpaque 1)
                       (3dRenderingContext 1)
                       (drawsContent 1)
                       (backgroundColor #008000)
                       (transform [0.77 0.00 0.64 0.00] [0.00 1.00 0.00 0.00] [-0.64 0.00 0.77 0.00] [0.00 0.00 50.00 1.00])
                     )
                   )
                 )
               )
             )
           )
         )
       )
     )
   )
 )