Fix "typo".

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 69 matching lines @@
       compiler = frog_pattern.group(1)
       runtime = 'd8'
       system = frog_pattern.group(2)
       mode = frog_pattern.group(3)
 
     elif web_pattern:
       compiler = 'dart2js'
       runtime = web_pattern.group(1)
       system = web_pattern.group(2)
       mode = 'release'
-      shard_index = dart2js_pattern.group(3)
-      total_shards = dart2js_pattern.group(4)
+      shard_index = web_pattern.group(3)
+      total_shards = web_pattern.group(4)
 
   if system == 'windows':
     system = 'win7'
 
   if (system == 'win7' and platform.system() != 'Windows') or (
       system == 'mac' and platform.system() != 'Darwin') or (
       system == 'linux' and platform.system() != 'Linux'):
     print ('Error: You cannot emulate a buildbot with a platform different '
         'from your own.')
     sys.exit(1)
@@ skipping 179 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())