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

third_party/WebKit/LayoutTests/imported/web-platform-tests/dom/nodes/DOMImplementation-createHTMLDocument.js

-function createHTMLDocuments(checkDoc) {
-  var tests = [
-    ["", "", ""],
-    [null, "null", "null"],
-    [undefined, undefined, ""],
-    ["foo  bar baz", "foo  bar baz", "foo bar baz"],
-    ["foo\t\tbar baz", "foo\t\tbar baz", "foo bar baz"],
-    ["foo\n\nbar baz", "foo\n\nbar baz", "foo bar baz"],
-    ["foo\f\fbar baz", "foo\f\fbar baz", "foo bar baz"],
-    ["foo\r\rbar baz", "foo\r\rbar baz", "foo bar baz"],
-  ]
-
-  tests.forEach(function(t, i) {
-    var title = t[0], expectedtitle = t[1], normalizedtitle = t[2]
-    test(function() {
-      var doc = document.implementation.createHTMLDocument(title);
-      checkDoc(doc, expectedtitle, normalizedtitle)
-    }, "createHTMLDocument test " + i + ": " + t.map(function(el) { return format_value(el) }))
-  })
-
-  test(function() {
-    var doc = document.implementation.createHTMLDocument();
-    checkDoc(doc, undefined, "")
-  }, "Missing title argument");
-}