Remove DOMImplementation.

sky/tests/mutation-observer/cross-document.sky

Index: sky/tests/mutation-observer/cross-document.sky
diff --git a/sky/tests/mutation-observer/cross-document.sky b/sky/tests/mutation-observer/cross-document.sky
index 580e3b72ef63c75afdf6fd26336ed15d1ad0b590..fdf93efc5338df26a8a1c45f9574d281991939b4 100644
--- a/sky/tests/mutation-observer/cross-document.sky
+++ b/sky/tests/mutation-observer/cross-document.sky
@@ -11,7 +11,7 @@ describe('MutationObserver cross document moves', function() {
         });
 
         observer.observe(div, {attributes: true});
-        var newDoc = document.implementation.createDocument('', '', null);
+        var newDoc = new Document();

[ojan, 2014/11/04 07:15:47]

I wish HTML could have nice things like this.

         newDoc.appendChild(div);
         div.id = 'foo';
         setTimeout(function() {
@@ -32,7 +32,7 @@ describe('MutationObserver cross document moves', function() {
         });
 
         observer.observe(div, {attributes: true, subtree: true});
-        var newDoc = document.implementation.createDocument();
+        var newDoc = new Document();
         newDoc.appendChild(div);
         subDiv.id = 'foo';
         setTimeout(function() {