From bd2f5912168d319de76c4e5c81777516cdf25cca Mon Sep 17 00:00:00 2001
From: Steve Orvell <steve@orvellia.com>
Date: Thu, 21 Nov 2013 09:19:29 -0800
Subject: [PATCH] =?UTF-8?q?Restore=20compatibility=20between=20TemplateBin?=
 =?UTF-8?q?ding=20and=20Custom=20Elements=20polyfill.=20TemplateBinding=20?=
 =?UTF-8?q?now=20uses=20a=20staging=20document=20for=20creating=20elements?=
 =?UTF-8?q?.=20Elements=20should=20be=20upgraded=20there.=20Custom=20Eleme?=
 =?UTF-8?q?nts=20requires=20manually=20setting=20up=20documents=20to=20sup?=
 =?UTF-8?q?port=20custom=20elements.=20To=20solve=20this=20generally,=20th?=
 =?UTF-8?q?is=20requirement=20could=20be=20removed.=20Alternatively,=20Tem?=
 =?UTF-8?q?plateBinding=20could=20be=20setup=20to=20work=20with=20the=20CE?=
 =?UTF-8?q?=20polyfill.=20For=20simplicity=20we=E2=80=99ve=20directly=20pa?=
 =?UTF-8?q?tched=20importNode=20here.=20This=20is=20the=20mechanism=20Temp?=
 =?UTF-8?q?lateBinding=20uses=20to=20create=20dom=20in=20the=20staging=20d?=
 =?UTF-8?q?ocument.=20Also=20included=20is=20a=20temp=20workaround=20for?=
 =?UTF-8?q?=20SD=20polyfill=20support=20for=20importNode.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/patches-mdv.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/patches-mdv.js b/src/patches-mdv.js
index 9f2138c..310a637 100644
--- a/src/patches-mdv.js
+++ b/src/patches-mdv.js
@@ -35,6 +35,24 @@ window.addEventListener('WebComponentsReady', function() {
   }
 });
 
+
+if (window.CustomElements && !CustomElements.useNative) {
+  var originalImportNode = Document.prototype.importNode;
+  Document.prototype.importNode = function(node, deep) {
+    // TODO(sorvell): remove these conditionals when polyfill supports importNode
+    // https://github.com/Polymer/ShadowDOM/issues/317
+    if (window.ShadowDOMPolyfill) {
+      node = ShadowDOMPolyfill.unwrap(node);
+    } 
+    var imported = originalImportNode.call(this, node, deep);
+    CustomElements.upgradeAll(imported);
+    if (window.ShadowDOMPolyfill) {
+      imported = ShadowDOMPolyfill.wrap(imported);
+    } 
+    return imported;
+  }
+}
+
 // exports
 scope.flush = flush;