Update dom streams with new signatures.

tools/dom/templates/html/impl/impl_IDBFactory.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.
 
 part of $LIBRARYNAME;
 
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   /**
    * Checks to see if Indexed DB is supported on the current platform.
    */
@@ skipping 42 matching lines @@
     try {
       var request = _deleteDatabase(name);
 
       if (onBlocked != null) {
         request.onBlocked.listen(onBlocked);
       }
       var completer = new Completer.sync();
       request.onSuccess.listen((e) {
         completer.complete(this);
       });
-      request.onError.listen((e) {
-        completer.completeError(e);
-      });
+      request.onError.listen(completer.completeError);
       return completer.future;
     } catch (e, stacktrace) {
       return new Future.error(e, stacktrace);
     }
   }
 
   @DomName('IDBFactory.getDatabaseNames')
   @SupportedBrowser(SupportedBrowser.CHROME)
   @Experimental()
   Future<List<String>> getDatabaseNames() {
@@ skipping 26 matching lines @@
  * Ties a request to a completer, so the completer is completed when it succeeds
  * and errors out when the request errors.
  */
 Future _completeRequest(Request request) {
   var completer = new Completer.sync();
   // TODO: make sure that completer.complete is synchronous as transactions
   // may be committed if the result is not processed immediately.
   request.onSuccess.listen((e) {
     completer.complete(request.result);
   });
-  request.onError.listen((e) {
-    completer.completeError(e);
-  });
+  request.onError.listen(completer.completeError);
   return completer.future;
 }