Properly managing overlfow-aligment for inherit and initial.

LayoutTests/fast/alignment/resources/alignment-parsing-utils.js

Index: LayoutTests/fast/alignment/resources/alignment-parsing-utils.js
diff --git a/LayoutTests/fast/alignment/resources/alignment-parsing-utils.js b/LayoutTests/fast/alignment/resources/alignment-parsing-utils.js
index 54add53c84d1a74350f7c0558afeb800591c4b28..4670fc8fd6795d728370861b7459f9820bdcd057 100644
--- a/LayoutTests/fast/alignment/resources/alignment-parsing-utils.js
+++ b/LayoutTests/fast/alignment/resources/alignment-parsing-utils.js
@@ -8,20 +8,44 @@ function checkValues(element, property, propertyID, value, computedValue)
 
 function checkBadValues(element, property, propertyID, value)
 {
-  element.style.justifyItems = value;
-  checkValues(element, property, propertyID, "", "start");
+    element.style.justifyItems = value;
+    checkValues(element, property, propertyID, "", "start");
 }
 
-function checkInitialValues(element, property, propertyID, display)
+function checkInitialValues(element, property, propertyID, display, value)
 {
-  var initial = "start";
-  if (display == "grid" || display == "flex") {
-    element.style.display = display;
-    initial = "stretch";
-  }
+    var initial = "start";
+    if (display == "grid" || display == "flex") {
+      element.style.display = display;
+      initial = "stretch";
+    }
 
-  element.style.justifyItems = "center";
-  checkValues(element, property, propertyID, "center", "center");
-  element.style.justifyItems = "initial";
-  checkValues(element, property, propertyID, "initial", initial);
+    element.style.justifyItems = value;
+    checkValues(element, property, propertyID, value, value);
+    element.style.justifyItems = "initial";
+    checkValues(element, property, propertyID, "initial", initial);
+}
+
+function checkInheritValues(element, property, propertyID, value)
+{
+    parentElement = document.createElement("div");
+    document.body.appendChild(parentElement);
+    parentElement.style.justifyItems = value;
+    checkValues(parentElement, property, propertyID, value, value);
+
+    element = document.createElement("div");
+    parentElement.appendChild(element);
+    element.style.justifyItems = "inherit";
+    checkValues(element, property, propertyID, "inherit", value);
+}
+
+function checkLegacyValues(element, property, propertyID, value)
+{
+    document.body.appendChild(parentElement);
+    parentElement.style.justifyItems = value;
+    checkValues(parentElement, property, propertyID, value, value);
+
+    element = document.createElement("div");
+    parentElement.appendChild(element);
+    checkValues(element, property, propertyID, "", value);
 }