Support scientific notation in CSS numbers/percentages/dimensions

LayoutTests/css-parser/counter-parsing.html

Index: LayoutTests/css-parser/counter-parsing.html
diff --git a/LayoutTests/css-parser/counter-parsing.html b/LayoutTests/css-parser/counter-parsing.html
index b82f17a936909d9aab096418c4bae5125006e922..e1b89fecaf031c19999668eb126f3e1bbab66c0a 100644
--- a/LayoutTests/css-parser/counter-parsing.html
+++ b/LayoutTests/css-parser/counter-parsing.html
@@ -3,7 +3,7 @@
 <script src="../resources/testharnessreport.js"></script>
 <script src="resources/property-parsing-test.js"></script>
 <script>
-assert_valid_value("counterIncrement", "hello world 999");
+assert_valid_value("counterIncrement", "hello world 999", "hello 1, world 999");
 assert_invalid_value("counterIncrement", 'hello "world"');
 assert_invalid_value("counterIncrement", "40");
 assert_invalid_value("counterReset", 'c 10 20');