DOMException toString is not correct

LayoutTests/fast/forms/time/time-stepup-stepdown-expected.txt

Index: LayoutTests/fast/forms/time/time-stepup-stepdown-expected.txt
diff --git a/LayoutTests/fast/forms/time/time-stepup-stepdown-expected.txt b/LayoutTests/fast/forms/time/time-stepup-stepdown-expected.txt
index 5887e224b32eee77d237d42cc06d2ae3f1929394..2f4aec0212b674f9d926d91d207c17a3ab74b177 100644
--- a/LayoutTests/fast/forms/time/time-stepup-stepdown-expected.txt
+++ b/LayoutTests/fast/forms/time/time-stepup-stepdown-expected.txt
@@ -4,8 +4,8 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
 
 
 Invalid value
-PASS stepUp("", null, null) threw exception Error: InvalidStateError: DOM Exception 11.
-PASS stepDown("", null, null) threw exception Error: InvalidStateError: DOM Exception 11.
+PASS stepUp("", null, null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
+PASS stepDown("", null, null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
 Non-number arguments
 PASS stepUp("20:13", null, null, "0") is "20:13"
 PASS stepDown("20:13", null, null, "0") is "20:13"
@@ -21,15 +21,15 @@ PASS stepDown("20:13", null, null, 11) is "20:02"
 PASS stepUp("20:13", "4", null, 2) is "20:13:08"
 PASS stepDown("20:13", "4", null, 3) is "20:12:48"
 Step=any
-PASS stepUp("20:13", "any", null) threw exception Error: InvalidStateError: DOM Exception 11.
-PASS stepDown("20:13", "any", null) threw exception Error: InvalidStateError: DOM Exception 11.
+PASS stepUp("20:13", "any", null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
+PASS stepDown("20:13", "any", null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
 Overflow/underflow
-PASS stepUp("20:13", "3.40282346e+38", null) threw exception Error: InvalidStateError: DOM Exception 11.
-PASS stepDown("20:13", "3.40282346e+38", null) threw exception Error: InvalidStateError: DOM Exception 11.
-PASS stepUp("20:13", "1", "20:13") threw exception Error: InvalidStateError: DOM Exception 11.
-PASS stepDown("20:13", "1", "20:13") threw exception Error: InvalidStateError: DOM Exception 11.
-PASS stepUp("23:59", null, null) threw exception Error: InvalidStateError: DOM Exception 11.
-PASS stepDown("00:00", null, null) threw exception Error: InvalidStateError: DOM Exception 11.
+PASS stepUp("20:13", "3.40282346e+38", null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
+PASS stepDown("20:13", "3.40282346e+38", null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
+PASS stepUp("20:13", "1", "20:13") threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
+PASS stepDown("20:13", "1", "20:13") threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
+PASS stepUp("23:59", null, null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
+PASS stepDown("00:00", null, null) threw exception InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable..
 
 PASS successfullyParsed is true