Revert "Converting Polymer and TemplateElement to use deprecated Node.document"

pkg/polymer/lib/src/instance.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of polymer;
 
 /**
  * Use this annotation to publish a field as an attribute. For example:
  *
  *     class MyPlaybackElement extends PolymerElement {
@@ skipping 111 matching lines @@
    * which resets the timer. For example:
    *
    *     _myJob = job(_myJob, callback, const Duration(milliseconds: 100));
    *
    * Returns a job handle which can be used to re-register a job.
    */
   Job job(Job job, void callback(), Duration wait) =>
       runJob(job, callback, wait);
 
   void polymerCreated() {
-    if (this.document.window != null || alwaysPrepare ||
+    if (this.ownerDocument.window != null || alwaysPrepare ||
         _preparingElements > 0) {
       prepareElement();
     }
   }
 
   void prepareElement() {
     // Dart note: get the _declaration, which also marks _elementPrepared
     _declaration = _getDeclaration(this.runtimeType);
     // do this first so we can observe changes during initialization
     observeProperties();
@@ skipping 809 matching lines @@
 /**
  * Base class for PolymerElements deriving from HtmlElement.
  *
  * See [Polymer].
  */
 class PolymerElement extends HtmlElement with Polymer, Observable {
   PolymerElement.created() : super.created() {
     polymerCreated();
   }
 }