Use drt instead of chrome in dart2js/chrome/linux.

utils/compiler/buildbot.py

 #!/usr/bin/python
 
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Dart frog buildbot steps
 
 Runs tests for the frog or dart2js compiler.
 """
@@ skipping 171 matching lines @@
 
   # Make sure we are in the frog directory
   os.chdir(DART_PATH)
 
   if system.startswith('win') and runtime == 'ie':
     # There should not be more than one InternetExplorerDriver instance
     # running at a time. For details, see
     # http://code.google.com/p/selenium/wiki/InternetExplorerDriver.
     flags = flags + ['-j1']
 
+  if system == 'linux' and runtime == 'chrome':
+    # TODO(ngeoffray): We should install selenium on the buildbot.
+    runtime = 'drt'
+
   if compiler == 'dart2js':
     if option == 'checked': flags = flags + ['--host-checked']
 
     if runtime == 'd8':
       # The dart2js compiler isn't self-hosted (yet) so we run its
       # unit tests on the VM. We avoid doing this on the builders
       # that run the browser tests to cut down on the cycle time.
       TestStep("dart2js_unit", mode, system, 'none', 'vm', ['leg'], flags)
 
     # Run the default set of test suites.
@@ skipping 78 matching lines @@
   if status == 0 and compiler != 'dart2js':
     status = TestCompiler(compiler, runtime, mode, system, option,
                           test_flags + ['--checked'])
 
   if runtime != 'd8': CleanUpTemporaryFiles(system, runtime)
   if status != 0: print '@@@STEP_FAILURE@@@'
   return status
 
 if __name__ == '__main__':
   sys.exit(main())