Move the dom directory from web-platform-tests/ to wpt/.

third_party/WebKit/LayoutTests/imported/web-platform-tests/dom/nodes/Document-createComment-createTextNode.js

-function test_create(method, iface, nodeType, nodeName) {
-  ["\u000b", "a -- b", "a-", "-b", null, undefined].forEach(function(value) {
-    test(function() {
-      var c = document[method](value);
-      var expected = String(value);
-      assert_true(c instanceof iface);
-      assert_true(c instanceof CharacterData);
-      assert_true(c instanceof Node);
-      assert_equals(c.ownerDocument, document);
-      assert_equals(c.data, expected, "data");
-      assert_equals(c.nodeValue, expected, "nodeValue");
-      assert_equals(c.textContent, expected, "textContent");
-      assert_equals(c.length, expected.length);
-      assert_equals(c.nodeType, nodeType);
-      assert_equals(c.nodeName, nodeName);
-      assert_equals(c.hasChildNodes(), false);
-      assert_equals(c.childNodes.length, 0);
-      assert_equals(c.firstChild, null);
-      assert_equals(c.lastChild, null);
-    }, method + "(" + format_value(value) + ")");
-  });
-}