Provide table of wrapper types for dart:blink

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 121 matching lines @@
  * Spawn a DOM isolate using the given URI in the same window.
  * This isolate is not concurrent.  It runs on the browser thread
  * with full access to the DOM.
  * Note: this API is still evolving and may move to dart:isolate.
  */
 @Experimental()
 Future<Isolate> spawnDomUri(Uri uri, List<String> args, message) {
   // TODO(17738): Plumb arguments and return value through.
   return _Utils.spawnDomUri(uri.toString());
 }
+$if DART_USE_BLINK
+// FIXME: This should be generated.
+const _typeMap = const {
+  'EventTarget': EventTarget,
+  'Window': Window,
+  'Element': Element,
+  'Console': Console,
+  'Node': Node,
+  'Document': Document,
+  'HTMLElement': HtmlElement,
+  'HTMLCanvasElement': CanvasElement,
+  'HTMLDocument': HtmlDocument,
+};
+
+Type _getType(String key) {
+  if (!_typeMap.containsKey(key))
+    return null;
+  return _typeMap[key];
+}
+$endif