The first in a series of mass rebaselines. I tried to avoid

LayoutTests/fast/js/mozilla/strict/15.4.4.9-expected.txt

Index: LayoutTests/fast/js/mozilla/strict/15.4.4.9-expected.txt
diff --git a/LayoutTests/fast/js/mozilla/strict/15.4.4.9-expected.txt b/LayoutTests/fast/js/mozilla/strict/15.4.4.9-expected.txt
index 5105d76d0c8ae5c2b34803532f7d42a62fa8878e..3ad5ff799093d4887ad34e669d526f272fa8b197 100644
--- a/LayoutTests/fast/js/mozilla/strict/15.4.4.9-expected.txt
+++ b/LayoutTests/fast/js/mozilla/strict/15.4.4.9-expected.txt
@@ -1,14 +1,14 @@
-PASS 'use strict'; var a = arr(); [a.shift(), a] threw exception of type TypeError.
-PASS var a = arr(); [a.shift(), a] threw exception of type TypeError.
+FAIL 'use strict'; var a = arr(); [a.shift(), a] should throw an instance of TypeError
+FAIL var a = arr(); [a.shift(), a] should throw an instance of TypeError
 PASS true === true
-PASS 'use strict'; var o = obj(); [Array.prototype.shift.call(o), o] threw exception of type TypeError.
-PASS var o = obj(); [Array.prototype.shift.call(o), o] threw exception of type TypeError.
+FAIL 'use strict'; var o = obj(); [Array.prototype.shift.call(o), o] should throw an instance of TypeError
+FAIL var o = obj(); [Array.prototype.shift.call(o), o] should throw an instance of TypeError
 PASS true === true
-PASS 'use strict'; var a = agap(); [a.shift(), a] threw exception of type TypeError.
-PASS var a = agap(); [a.shift(), a] threw exception of type TypeError.
+FAIL 'use strict'; var a = agap(); [a.shift(), a] should throw an instance of TypeError
+FAIL var a = agap(); [a.shift(), a] should throw an instance of TypeError
 PASS true === true
-PASS 'use strict'; var o = ogap(); [Array.prototype.shift.call(o), o] threw exception of type TypeError.
-PASS var o = ogap(); [Array.prototype.shift.call(o), o] threw exception of type TypeError.
+FAIL 'use strict'; var o = ogap(); [Array.prototype.shift.call(o), o] should throw an instance of TypeError
+FAIL var o = ogap(); [Array.prototype.shift.call(o), o] should throw an instance of TypeError
 PASS true === true
  PASSED! 
 PASS successfullyParsed is true