More function literal changes in tests.

tests/standalone/io/http_headers_test.dart

 // 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.
 
 import 'dart:math';
 
 part "../../../sdk/lib/io/input_stream.dart";
 part "../../../sdk/lib/io/output_stream.dart";
 part "../../../sdk/lib/io/chunked_stream.dart";
 part "../../../sdk/lib/io/string_stream.dart";
@@ skipping 154 matching lines @@
 
 void testEnumeration() {
   _HttpHeaders headers = new _HttpHeaders();
   Expect.isNull(headers[HttpHeaders.PRAGMA]);
   headers.add("My-Header-1", "value 1");
   headers.add("My-Header-2", "value 2");
   headers.add("My-Header-1", "value 3");
   bool myHeader1 = false;
   bool myHeader2 = false;
   int totalValues = 0;
-  headers.forEach(f(String name, List<String> values) {
+  headers.forEach((String name, List<String> values) {
     totalValues += values.length;
     if (name == "my-header-1") {
       myHeader1 = true;
       Expect.isTrue(values.indexOf("value 1") != -1);
       Expect.isTrue(values.indexOf("value 3") != -1);
     }
     if (name == "my-header-2") {
       myHeader2 = true;
       Expect.isTrue(values.indexOf("value 2") != -1);
     }
@@ skipping 216 matching lines @@
   testIfModifiedSince();
   testHost();
   testEnumeration();
   testHeaderValue();
   testContentType();
   testContentTypeCache();
   testCookie();
   testInvalidCookie();
   testHeaderLists();
 }