Don't handle unitless length quirk in CSS parser fast path

third_party/WebKit/LayoutTests/css-parser/resources/property-parsing-test.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // testharness.js and testharnessreport.js need to be included first
 
 // Properties should be given in camelCase format
 
 function convert_to_dashes(property) {
     return property.replace(/[A-Z]/g, function(letter) {
         return "-" + letter.toLowerCase();
     });
 }
 
-function assert_valid_value(property, value, serializedValue) {
-    if (arguments.length != 3)
+function assert_valid_value(property, value, serializedValue, quirksModeOnly) {
+    if (arguments.length < 4)
+        quirksModeOnly = false;
+
+    if (arguments.length < 3)
         serializedValue = value;
 
     stringifiedValue = JSON.stringify(value);
+    dashedProperty = convert_to_dashes(property);
 
     test(function(){
-        assert_true(CSS.supports(convert_to_dashes(property), value));
-    }, "CSS.supports('" + property + "', " + stringifiedValue + ") should return true");
+        assert_equals(!quirksModeOnly, CSS.supports(dashedProperty, value));
+    }, "CSS.supports('" + dashedProperty + "', " + stringifiedValue + ") should return " + !quirksModeOnly);
 
     test(function(){
         var div = document.createElement('div');
         div.style[property] = value;
         assert_not_equals(div.style[property], "");
     }, "e.style['" + property + "'] = " + stringifiedValue + " should set the value");
 
     test(function(){
         var div = document.createElement('div');
         div.style[property] = value;
         var readValue = div.style[property];
         assert_equals(readValue, serializedValue);
         div.style[property] = readValue;
         assert_equals(div.style[property], readValue);
     }, "Serialization should round-trip after setting e.style['" + property + "'] = " + stringifiedValue);
 }
 
 function assert_invalid_value(property, value) {
     stringifiedValue = JSON.stringify(value);
+    dashedProperty = convert_to_dashes(property);
 
     test(function(){
-        assert_false(CSS.supports(convert_to_dashes(property), value));
-    }, "CSS.supports('" + property + "', " + stringifiedValue + ") should return false");
+        assert_false(CSS.supports(dashedProperty, value));
+    }, "CSS.supports('" + dashedProperty  + "', " + stringifiedValue + ") should return false");
 
     test(function(){
         var div = document.createElement('div');
         div.style[property] = value;
         assert_equals(div.style[property], "");
     }, "e.style['" + property + "'] = " + stringifiedValue + " should not set the value");
 }