[pkg:shadow_dom] workaround issue in ownerDocument

pkg/shadow_dom/lib/shadow_dom.debug.js

 if ((!HTMLElement.prototype.createShadowRoot &&
     !HTMLElement.prototype.webkitCreateShadowRoot) ||
     window.__forceShadowDomPolyfill) {
 
 /*
  * Copyright 2013 The Polymer Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style
  * license that can be found in the LICENSE file.
  */
 (function() {
@@ skipping 1419 matching lines @@
       var parentNode = child.parentNode;
       if (!parentNode)
         return false;
       return this.contains(parentNode);
     },
 
     compareDocumentPosition: function(otherNode) {
       // This only wraps, it therefore only operates on the composed DOM and not
       // the logical DOM.
       return originalCompareDocumentPosition.call(this.impl, unwrap(otherNode));
+    },
+
+    // TODO(jmesserly): this is a workaround for
+    // https://github.com/Polymer/ShadowDOM/issues/200
+    get ownerDocument() {
+      scope.renderAllPending();
+      return wrap(this.impl.ownerDocument);
     }
   });
 
-  defineWrapGetter(Node, 'ownerDocument');
+  // TODO(jmesserly): this is commented out to workaround:
+  // https://github.com/Polymer/ShadowDOM/issues/200
+  //defineWrapGetter(Node, 'ownerDocument');
 
   // We use a DocumentFragment as a base and then delete the properties of
   // DocumentFragment.prototype from the wrapper Node. Since delete makes
   // objects slow in some JS engines we recreate the prototype object.
   registerWrapper(OriginalNode, Node, document.createDocumentFragment());
   delete Node.prototype.querySelector;
   delete Node.prototype.querySelectorAll;
   Node.prototype = mixin(Object.create(EventTarget.prototype), Node.prototype);
 
   scope.wrappers.Node = Node;
@@ skipping 1735 matching lines @@
         }
       }
       return originalGetTag(obj);
     }
 
     return getTag;
   };
 })();
 
 }