DOMException toString is not correct

LayoutTests/fast/forms/search/search-setrangetext-expected.txt

Index: LayoutTests/fast/forms/search/search-setrangetext-expected.txt
diff --git a/LayoutTests/fast/forms/search/search-setrangetext-expected.txt b/LayoutTests/fast/forms/search/search-setrangetext-expected.txt
index 0c0225fcf78c3ddae6298efb6b13be83f82485c4..93d2439ab15163f08a0c80dde364cc8a6231f6e4 100644
--- a/LayoutTests/fast/forms/search/search-setrangetext-expected.txt
+++ b/LayoutTests/fast/forms/search/search-setrangetext-expected.txt
@@ -120,7 +120,7 @@ PASS element.value is "01234567A"
 PASS element.selectionStart is 8
 PASS element.selectionEnd is 9
 element.value = '0123456789'
-PASS element.setRangeText('A', 7, 3) threw exception Error: IndexSizeError: DOM Exception 1.
+PASS element.setRangeText('A', 7, 3) threw exception IndexSizeError: Index or size was negative, or greater than the allowed value..
 
 Running tests on input with attributes: {"type":"search","dir":"rtl"}
 
@@ -238,7 +238,7 @@ PASS element.value is "01234567A"
 PASS element.selectionStart is 8
 PASS element.selectionEnd is 9
 element.value = '0123456789'
-PASS element.setRangeText('A', 7, 3) threw exception Error: IndexSizeError: DOM Exception 1.
+PASS element.setRangeText('A', 7, 3) threw exception IndexSizeError: Index or size was negative, or greater than the allowed value..
 PASS successfullyParsed is true
 
 TEST COMPLETE