removed unused 'chromium' component

tools/testing/dart/test_options.dart

 // Copyright (c) 2011, 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:builtin");
 #import("drt_updater.dart");
 
@@ skipping 62 matching lines @@
 
    leg: Compile dart code by running leg on the standalone dart vm, and
        run the resulting javascript on D8.
 
    frogsh: Compile dart code by running frog on node.js, and run the
        resulting javascript on the same instance of node.js.
 
    dartium: Run dart code in a type="application/dart" script tag in a
        dartium build of DumpRenderTree.
 
-   chromium: Obsolete, not used, will be removed.
-
    frogium: Compile dart code by running frog on the standalone dart vm,
        and run the resulting javascript in a javascript script tag in
        a dartium build of DumpRenderTree.
 
    legium: Compile dart code by running leg on the standalone dart vm,
        and run the resulting javascript in a javascript script tag in
        a dartium build of DumpRenderTree.
 
    webdriver: Compile dart code by running frog on the standalone dart vm,
        and then run the resulting javascript in the browser that is specified
        by the --browser switch (e.g. chrome, safari, ff, etc.).
 
    dartc: Run dart code through the dartc static analyzer (does not
        execute dart code).
 ''',
               ['-c', '--component'],
-              ['most', 'vm', 'dartc', 'frog', 'frogsh', 'leg',
-               'dartium', 'chromium', 'frogium', 'legium', 'webdriver'],
+              ['most', 'vm', 'frog', 'leg', 'frogsh', 'dartium',  'frogium',
+               'legium', 'webdriver', 'dartc'],
               'vm'),
           new _TestOptionSpecification(
               'arch',
               'The architecture to run tests for',
               ['-a', '--arch'],
               ['all', 'ia32', 'x64', 'simarm'],
               'ia32'),
           new _TestOptionSpecification(
               'system',
               'The operating system to run tests on',
@@ skipping 350 matching lines @@
       if (DumpRenderTreeUpdater.componentRequiresDRT(components)) {
         DumpRenderTreeUpdater.update();
       }
     }
 
     // Adjust default timeout based on mode and component.
     if (configuration['timeout'] == -1) {
       var timeout = 60;
       switch (configuration['component']) {
         case 'dartc':
-        case 'chromium':
         case 'dartium':
         case 'frogium':
         case 'legium':
         case 'webdriver':
           timeout *= 4;
           break;
         case 'leg':
         case 'frog':
           if (configuration['mode'] == 'debug') {
             timeout *= 4;
@@ skipping 59 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }