fix(browser_adapter): work around WebKit bug with importing template elements

Closes angular#851 Closes angular#853

Author: caitp

modules/angular2/src/dom/browser_adapter.es6

@@ -234,7 +234,17 @@ export class BrowserDomAdapter extends DomAdapter {
  return node instanceof HTMLElement && isPresent(node.shadowRoot);
  }
  importIntoDoc(node:Node) {
- return document.importNode(node, true);
+ var result = document.importNode(node, true);
+ // Workaround WebKit https://bugs.webkit.org/show_bug.cgi?id=137619
+ if (this.isTemplateElement(result) &&
+ !result.content.childNodes.length && node.content.childNodes.length) {
+ var childNodes = node.content.childNodes;
+ for (var i = 0; i < childNodes.length; ++i) {
+ result.content.appendChild(
+ this.importIntoDoc(childNodes[i]));
+ }
+ }
+ return result;
  }
  isPageRule(rule) {
  return rule.type === CSSRule.PAGE_RULE;