Remove special casing for browser timeout

tools/testing/dart/test_options.dart

 // Copyright (c) 2013, 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.
 
 library test_options_parser;
 
 import "dart:io";
 import "dart:math";
 import "drt_updater.dart";
 import "test_suite.dart";
@@ skipping 590 matching lines @@
           if (configuration['mode'] == 'debug') {
             timeout *= 8;
           }
           if (configuration['host_checked']) {
             timeout *= 16;
           }
           if (configuration['checked']) {
             timeout *= 2;
           }
 
-          const BROWSERS = const [
-            'ie9', 'ie10', 'ff', 'chrome', 'safari', 'opera'
-          ];
-
-          if (BROWSERS.contains(configuration['runtime'])) {
-            timeout *= 8; // Allow additional time for browser testing to run.
-          }
           break;
         default:
           if (configuration['mode'] == 'debug') {
             timeout *= 2;
           }
           if (const ['drt', 'dartium'].contains(configuration['runtime'])) {
             timeout *= 4; // Allow additional time for browser testing to run.
           }
           break;
       }
@@ skipping 71 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }