Reject pseudo class inside :not()

LayoutTests/fast/dom/shadow/content-selector-query.html

Index: LayoutTests/fast/dom/shadow/content-selector-query.html
diff --git a/LayoutTests/fast/dom/shadow/content-selector-query.html b/LayoutTests/fast/dom/shadow/content-selector-query.html
index 11c4010888c1b254e86a6c0b672251c1a654aa4a..40405cc8766548f31df8e73a2f3d267e8fae6103 100644
--- a/LayoutTests/fast/dom/shadow/content-selector-query.html
+++ b/LayoutTests/fast/dom/shadow/content-selector-query.html
@@ -51,7 +51,7 @@ var dataOfInvalidCases = [
     'div:nth-last-of-type(1)', 'div:first-child', 'div:last-child', 'div:first-of-type',
     'div:last-of-type', 'div:only-of-type',
     'div:first-of-type:last-of-type', 'div.elem:visited', '*:visited',
-    'div:first-of-type, div', 'div, div:first-of-type', 'div:first-of-type, div:last-of-type',
+    'div:first-of-type, div', 'div, div:first-of-type', 'div:first-of-type, div:last-of-type', 'div:not(:not(div))', 'div:not(:hover)', 

[hayato, 2014/09/09 05:58:32]

Could you add a test where a selector which is not a simple selector is used
inside of the argument of `:not()`?

For example, 'div:not(div div)', 'div:not(div div:not)' and so on.
I am afraid that your code can't handle these cases. Could you try that?

[hayato, 2014/09/09 05:58:32]

You might want to remove a space at the end of the line.

 ];
 
 var dataOfValidCasesIfPseudoClassIsAllowed = [