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

third_party/WebKit/LayoutTests/fast/css/uri-token-parsing-expected.txt

 Test parsing of CSS URI tokens. Older versions of WebKit did some double processing of these, hence this test would have failed.
 
 SUCCESS
 
 Rules from the stylesheet:
 
-#a { content: url(c); }
-#b { content: url(d); }
-#c { content: url(e); }
-#d { content: url(f); }
-#f { content: url(c); }
-#g { content: url(' d'); }
-#h { content: url('e '); }
-#i { content: url(' f '); }
-#j { content: url('url(g)'); }
-#l { content: url(c); }
-#m { content: url(' d'); }
-#n { content: url('e '); }
-#o { content: url(' f '); }
-#p { content: url('url(g)'); }
-#q { cursor: url('url(q)'), pointer; }
-#r { list-style-image: url('url(r)'); }
-#s { background-image: url('url(s)'); }
-#t { -webkit-mask-image: url('url(t)'); }
-#u { -webkit-border-image: url('url(u)') 1 2 3 4 fill stretch round; }
-#v { -webkit-mask-box-image-source: url('url(v)'); }
-#w { content: url('w\\d w'); }
-#x { content: url(' x x\\9 x '); }
-#y { content: url('y y\\9 y'); }
+#a { content: url("c"); }
+#b { content: url("d"); }
+#c { content: url("e"); }
+#d { content: url("f"); }
+#f { content: url("c"); }
+#g { content: url(" d"); }
+#h { content: url("e "); }
+#i { content: url(" f "); }
+#j { content: url("url(g)"); }
+#l { content: url("c"); }
+#m { content: url(" d"); }
+#n { content: url("e "); }
+#o { content: url(" f "); }
+#p { content: url("url(g)"); }
+#q { cursor: url("url(q)"), pointer; }
+#r { list-style-image: url("url(r)"); }
+#s { background-image: url("url(s)"); }
+#t { -webkit-mask-image: url("url(t)"); }
+#u { -webkit-border-image: url("url(u)") 1 2 3 4 fill stretch round; }
+#v { -webkit-mask-box-image-source: url("url(v)"); }
+#w { content: url("w\d w"); }
+#x { content: url(" x x\9 x "); }
+#y { content: url("y y\9 y"); }
 Expected result:
 
-#a { content: url(c); }
-#b { content: url(d); }
-#c { content: url(e); }
-#d { content: url(f); }
-#f { content: url(c); }
-#g { content: url(' d'); }
-#h { content: url('e '); }
-#i { content: url(' f '); }
-#j { content: url('url(g)'); }
-#l { content: url(c); }
-#m { content: url(' d'); }
-#n { content: url('e '); }
-#o { content: url(' f '); }
-#p { content: url('url(g)'); }
-#q { cursor: url('url(q)'), pointer; }
-#r { list-style-image: url('url(r)'); }
-#s { background-image: url('url(s)'); }
-#t { -webkit-mask-image: url('url(t)'); }
-#u { -webkit-border-image: url('url(u)') 1 2 3 4 fill stretch round; }
-#v { -webkit-mask-box-image-source: url('url(v)'); }
-#w { content: url('w\\d w'); }
-#x { content: url(' x x\\9 x '); }
-#y { content: url('y y\\9 y'); }
+#a { content: url("c"); }
+#b { content: url("d"); }
+#c { content: url("e"); }
+#d { content: url("f"); }
+#f { content: url("c"); }
+#g { content: url(" d"); }
+#h { content: url("e "); }
+#i { content: url(" f "); }
+#j { content: url("url(g)"); }
+#l { content: url("c"); }
+#m { content: url(" d"); }
+#n { content: url("e "); }
+#o { content: url(" f "); }
+#p { content: url("url(g)"); }
+#q { cursor: url("url(q)"), pointer; }
+#r { list-style-image: url("url(r)"); }
+#s { background-image: url("url(s)"); }
+#t { -webkit-mask-image: url("url(t)"); }
+#u { -webkit-border-image: url("url(u)") 1 2 3 4 fill stretch round; }
+#v { -webkit-mask-box-image-source: url("url(v)"); }
+#w { content: url("w\d w"); }
+#x { content: url(" x x\9 x "); }
+#y { content: url("y y\9 y"); }