Auto-rebaseline for r168245

LayoutTests/platform/win/virtual/gpu/compositedscrolling/overflow/overflow-scrollbar-layers-expected.txt

 (GraphicsLayer
   (bounds 800.00 600.00)
   (children 1
     (GraphicsLayer
       (bounds 800.00 600.00)
       (contentsOpaque 1)
       (drawsContent 1)
       (children 4
         (GraphicsLayer
           (position 8.00 13.00)
@@ skipping 76 matching lines @@
             (GraphicsLayer
               (position 85.00 85.00)
               (bounds 15.00 15.00)
               (drawsContent 1)
             )
           )
         )
         (GraphicsLayer
           (position 8.00 13.00)
           (bounds 100.00 100.00)
+          (drawsContent 1)
           (children 2
             (GraphicsLayer
               (bounds 100.00 100.00)
               (children 1
                 (GraphicsLayer
                   (bounds 10.00 10.00)
+                  (drawsContent 1)
                   (children 1
                     (GraphicsLayer
                     )
                   )
                 )
               )
             )
             (GraphicsLayer
               (position 85.00 85.00)
               (bounds 15.00 15.00)
               (drawsContent 1)
             )
           )
         )
       )
     )
   )
 )