Mark assertion. a=me

layout/reftests/bugs/reftest.list

@@ -1501,7 +1501,7 @@ random-if(layersGPUAccelerated) == 581317-1.html 581317-1-ref.html
 == 582037-1b.html 582037-1-ref.html
 == 582037-2a.html 582037-2-ref.html
 == 582037-2b.html 582037-2-ref.html
-== 582146-1.html about:blank
+asserts(0-1) == 582146-1.html about:blank
 == 584400-dash-length.svg 584400-dash-length-ref.svg
 == 584699-1.html 584699-1-ref.html
 == 585598-2.xhtml 585598-2-ref.xhtml