[CSS Grid Layout] Update named grid lines syntax to the last version of the specs

LayoutTests/fast/css-grid-layout/resources/non-grid-columns-rows-get-set-multiple.js

Index: LayoutTests/fast/css-grid-layout/resources/non-grid-columns-rows-get-set-multiple.js
diff --git a/LayoutTests/fast/css-grid-layout/resources/non-grid-columns-rows-get-set-multiple.js b/LayoutTests/fast/css-grid-layout/resources/non-grid-columns-rows-get-set-multiple.js
index edc06ecc6e1a4b5311e027d570bd4b749c632efc..9fb7b270c6089e03170c14c7bdcd77b44f8b314a 100755
--- a/LayoutTests/fast/css-grid-layout/resources/non-grid-columns-rows-get-set-multiple.js
+++ b/LayoutTests/fast/css-grid-layout/resources/non-grid-columns-rows-get-set-multiple.js
@@ -58,15 +58,15 @@ function testInherit()
 {
     var parentElement = document.createElement("div");
     document.body.appendChild(parentElement);
-    parentElement.style.gridDefinitionColumns = "50px 1fr 'last'";
-    parentElement.style.gridDefinitionRows = "101% 'middle' 45px";
-    testGridDefinitionsValues(parentElement, "50px 1fr last", "101% middle 45px");
+    parentElement.style.gridDefinitionColumns = "50px 1fr (last)";
+    parentElement.style.gridDefinitionRows = "101% (middle) 45px";
+    testGridDefinitionsValues(parentElement, "50px 1fr (last)", "101% (middle) 45px");
 
     element = document.createElement("div");
     parentElement.appendChild(element);
     element.style.gridDefinitionColumns = "inherit";
     element.style.gridDefinitionRows = "inherit";
-    testGridDefinitionsValues(element, "50px 1fr last", "101% middle 45px");
+    testGridDefinitionsValues(element, "50px 1fr (last)", "101% (middle) 45px");
 
     document.body.removeChild(parentElement);
 }
@@ -78,9 +78,9 @@ function testInitial()
 {
     element = document.createElement("div");
     document.body.appendChild(element);
-    element.style.gridDefinitionColumns = "150% 'middle' 55px";
-    element.style.gridDefinitionRows = "1fr 'line' 2fr 'line'";
-    testGridDefinitionsValues(element, "150% middle 55px", "1fr line 2fr line");
+    element.style.gridDefinitionColumns = "150% (middle) 55px";
+    element.style.gridDefinitionRows = "1fr (line) 2fr (line)";
+    testGridDefinitionsValues(element, "150% (middle) 55px", "1fr (line) 2fr (line)");
 
     element.style.gridDefinitionColumns = "initial";
     element.style.gridDefinitionRows = "initial";