fix(HtmlParser): allow ng-content elements regardless the namespace

relates to #5547
Closes #5745

Author: vicb

modules/angular2/src/compiler/template_preparser.ts

@@ -1,5 +1,6 @@
 import {HtmlElementAst} from './html_ast';
 import {isBlank, isPresent} from 'angular2/src/facade/lang';
+import {splitNsName} from './html_tags';
 
 const NG_CONTENT_SELECT_ATTR = 'select';
 const NG_CONTENT_ELEMENT = 'ng-content';
@@ -31,7 +32,7 @@ export function preparseElement(ast: HtmlElementAst): PreparsedElement {
   selectAttr = normalizeNgContentSelect(selectAttr);
   var nodeName = ast.name.toLowerCase();
   var type = PreparsedElementType.OTHER;
-  if (nodeName == NG_CONTENT_ELEMENT) {
+  if (splitNsName(nodeName)[1] == NG_CONTENT_ELEMENT) {
     type = PreparsedElementType.NG_CONTENT;
   } else if (nodeName == STYLE_ELEMENT) {
     type = PreparsedElementType.STYLE;

modules/angular2/test/compiler/template_parser_spec.ts

@@ -106,6 +106,15 @@ export function main() {
         expect(humanizeTplAst(parsed)).toEqual([[NgContentAst]]);
       });
 
+      it('should parse ngContent regardless the namespace', () => {
+        var parsed = parse('<svg><ng-content></ng-content></svg>', []);
+        expect(humanizeTplAst(parsed))
+            .toEqual([
+              [ElementAst, '@svg:svg'],
+              [NgContentAst],
+            ]);
+      });
+
       it('should parse bound text nodes', () => {
         expect(humanizeTplAst(parse('{{a}}', []))).toEqual([[BoundTextAst, '{{ a }}']]);
       });