Remove DOMImplementation.

sky/tests/lowlevel/create-document.sky

Index: sky/tests/lowlevel/create-document.sky
diff --git a/sky/tests/lowlevel/dom-implementation-create-document.sky b/sky/tests/lowlevel/create-document.sky
similarity index 53%
rename from sky/tests/lowlevel/dom-implementation-create-document.sky
rename to sky/tests/lowlevel/create-document.sky
index 62e65b382be13f03e8d167621d5305a7ba6218c4..cb4f7c3f0d8fbaf367dedbcd8d7cef7f9db7f45b 100644
--- a/sky/tests/lowlevel/dom-implementation-create-document.sky
+++ b/sky/tests/lowlevel/create-document.sky
@@ -2,10 +2,10 @@
 <import src="../resources/chai.sky" />
 <import src="../resources/mocha.sky" />
 <script>
-describe('DOMImplementation', function() {
-  it('should let you create a document', function() {
-    var doc = document.implementation.createDocument();
-    assert.isNotNull(doc, 'createDocument should return a value');
+describe('Document', function() {
+  it('should have a constructor', function() {
+    var doc = new Document();
+    assert.isNotNull(doc);
     assert.doesNotThrow(function() {
       doc.registerElement('x-foo');
     }, 'new document should have a registration context');