Roll 50: Updated for push to origin/master.

tools/dom/templates/html/dartium/html_dartium.darttemplate

 // Copyright (c) 2012, 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.
 
 // DO NOT EDIT
 // Auto-generated dart:html library.
 
 /**
  * HTML elements and other resources for web-based applications that need to
  * interact with the browser and the DOM (Document Object Model).
@@ skipping 359 matching lines @@
 _createCustomUpgrader(Type customElementClass, $this) {
   return _blink.Blink_Utils.setInstanceInterceptor($this, customElementClass, customElement: true);
 }
 
 $else
 class DartHtmlDomObject extends NativeFieldWrapperClass2 {}
 
 _createCustomUpgrader(Type customElementClass, $this) => $this;
 
 $endif
+
+/**
+ * Emitted for any setlike IDL entry needs a callback signature.
+ * Today there is only one.
+ */
+@DomName('FontFaceSetForEachCallback')
+@Experimental() // untriaged
+typedef void FontFaceSetForEachCallback(
+    FontFace fontFace, FontFace fontFaceAgain, FontFaceSet set);
+