Make second argument to CSSStyleSheet.insertRule() optional again

LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt

Index: LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt
diff --git a/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt b/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt
index 3958439c7cf538216e5b08fbb7bf617fe00be4da..53e7cfb9ce87bfdbe62c7529814a683099ed3291 100644
--- a/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt
+++ b/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt
@@ -1,3 +1,4 @@
+CONSOLE WARNING: Calling CSSStyleSheet.insertRule() with one argument is deprecated. Please pass the index argument as well: insertRule(x, 0).
 This tests the behavior of non-numeric values in contexts where the DOM has a numeric parameter.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
@@ -14,7 +15,7 @@ PASS nonNumericPolicy('createCSSMediaRule().insertRule(ruleText, x)') is 'any ty
 PASS nonNumericPolicy('createCSSMediaRule().deleteRule(x)') is 'any type allowed (but not omitted)'
 PASS nonNumericPolicy('createCSSRuleList().item(x)') is 'any type allowed (but not omitted)'
 PASS nonNumericPolicy('createCSSStyleDeclaration().item(x)') is 'any type allowed'
-PASS nonNumericPolicy('createCSSStyleSheet().insertRule(ruleText, x)') is 'any type allowed (but not omitted)'
+PASS nonNumericPolicy('createCSSStyleSheet().insertRule(ruleText, x)') is 'any type allowed'
 PASS nonNumericPolicy('createCSSStyleSheet().deleteRule(x)') is 'any type allowed (but not omitted)'
 PASS nonNumericPolicy('createCSSStyleSheet().addRule(selector, styleText, x)') is 'any type allowed'
 PASS nonNumericPolicy('createCSSStyleSheet().removeRule(x)') is 'any type allowed'