Autorebaseline for r169180.

LayoutTests/platform/mac/virtual/softwarecompositing/rtl/rtl-iframe-absolute-overflow-expected.txt

 (GraphicsLayer
   (bounds 800.00 600.00)
   (children 1
     (GraphicsLayer
       (bounds 800.00 600.00)
       (contentsOpaque 1)
       (drawsContent 1)
       (children 1
         (GraphicsLayer
           (bounds 400.00 400.00)
@@ skipping 43 matching lines @@
                 )
               )
             )
           )
         )
       )
     )
   )
 )
 
+
+--------
+Frame: '<!--framePath //<!--frame0-->-->'
+--------
+(GraphicsLayer
+  (position -615.00 0.00)
+  (bounds 1000.00 1000.00)
+  (children 1
+    (GraphicsLayer
+      (bounds 1000.00 1000.00)
+      (drawsContent 1)
+      (children 1
+        (GraphicsLayer
+          (position 665.00 50.00)
+          (bounds 100.00 100.00)
+          (contentsOpaque 1)
+          (drawsContent 1)
+          (backgroundColor #008000)
+        )
+      )
+    )
+  )
+)
+