Make sure <url>s are being serialized according to spec

third_party/WebKit/LayoutTests/fast/css/script-tests/image-set-parsing.js

 description("Test the parsing of the -webkit-image-set function.");
 
 var result;
 
 function testImageSetRule(description, property, rule, expectedTexts)
 {
     debug("");
     debug(description + " : " + rule);
 
     var div = document.createElement("div");
     rule = "-webkit-image-set(" + rule + ")";
     div.style[property] = rule;
     document.body.appendChild(div);
-    result = div.style[property].replace(/url\([^#]*#/g, "url(#");
+    result = div.style[property].replace(/url\("[^#]*#/g, 'url("#');
     shouldBeEqualToString("result", rule);
     document.body.removeChild(div);
 }
 
 testImageSetRule("Single value for background-image",
                 "background-image",
-                "url(#a) 1x");
+                'url("#a") 1x');
 
 testImageSetRule("Multiple values for background-image",
                 "background-image",
-                "url(#a) 1x, url(#b) 2x");
+                'url("#a") 1x, url("#b") 2x');
 
 testImageSetRule("Multiple values for background-image, out of order",
                 "background-image",
-                "url(#c) 3x, url(#b) 2x, url(#a) 1x");
+                'url("#c") 3x, url("#b") 2x, url("#a") 1x');
 
 testImageSetRule("Single value for content",
                 "content",
-                "url(#a) 1x");
+                'url("#a") 1x');
 
 testImageSetRule("Multiple values for content",
                 "content",
-                "url(#a) 1x, url(#b) 2x");
+                'url("#a") 1x, url("#b") 2x');
 
 testImageSetRule("Single value for border-image",
                 "-webkit-border-image",
-                "url(#a) 1x");
+                'url("#a") 1x');
 
 testImageSetRule("Multiple values for border-image",
                 "-webkit-border-image",
-                "url(#a) 1x, url(#b) 2x");
+                'url("#a") 1x, url("#b") 2x');
 
 testImageSetRule("Single value for -webkit-mask-box-image-source",
                 "-webkit-mask-box-image-source",
-                "url(#a) 1x");
+                'url("#a") 1x');
 
 testImageSetRule("Multiple values for -webkit-mask-box-image-source",
                 "-webkit-mask-box-image-source",
-                "url(#a) 1x, url(#b) 2x");
+                'url("#a") 1x, url("#b") 2x');
 
 successfullyParsed = true;