Extract buildAccessibilityTree() from the individual layout test.

LayoutTests/resources/accessibility-helper.js

Index: LayoutTests/resources/accessibility-helper.js
diff --git a/LayoutTests/resources/accessibility-helper.js b/LayoutTests/resources/accessibility-helper.js
new file mode 100644
index 0000000000000000000000000000000000000000..1f782b83a81af381e7a22c8acf6b173d6bde19f4
--- /dev/null
+++ b/LayoutTests/resources/accessibility-helper.js
@@ -0,0 +1,36 @@
+function buildAccessibilityTree(accessibilityObject, indent, allAttributesRequired, targetObject, targetString) {
+    if (accessibilityObject.role == 'AXRole: AXColumn' || accessibilityObject.role == 'AXRole: AXTableHeaderContainer')

[dmazzoni, 2015/01/28 20:38:03]

This should be a parameter rather than every test breaking on a column or table
header container. Maybe a parameter could be "rolesToIgnore" or something like
that.

+        return true;
+
+    var str = "";
+    for (var i = 0; i < indent; i++)
+        str += "    ";
+    str += accessibilityObject.role;
+    str += " " + accessibilityObject.stringValue;
+    str += allAttributesRequired && accessibilityObject.role == '' ? accessibilityObject.allAttributes() : '';
+    str += targetObject && accessibilityObject.isEqual(targetObject) ? "     " + targetString : '';
+    str += "\n";
+
+    document.getElementById("console").innerText += str;
+
+    if (accessibilityObject.stringValue.indexOf('End of test') >= 0)
+        return false;
+
+    var count = accessibilityObject.childrenCount;
+    for (var i = 0; i < count; i++) {
+        if (!buildAccessibilityTree(accessibilityObject.childAtIndex(i), indent + 1, allAttributesRequired, targetObject, targetString))
+            return false;
+    }
+
+    return true;
+}
+
+function generateAccessibilityTree(accessibilityObject) {
+    var count = accessibilityObject.childrenCount;
+    for (var i = 0; i < count; i++) {
+        if (!generateAccessibilityTree(accessibilityObject.childAtIndex(i)))
+            return false;
+    }
+
+    return true;
+}