Fix sharding index extraction for in browser testing.

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.
 
 """Dart2js buildbot steps
 
 Runs tests for the  dart2js compiler.
 """
@@ skipping 61 matching lines @@
 
   if builder_name:
     dart2js_pattern = re.match(DART2JS_BUILDER, builder_name)
     web_pattern = re.match(WEB_BUILDER, builder_name)
 
     if web_pattern:
       compiler = 'dart2js'
       runtime = web_pattern.group(2)
       system = web_pattern.group(3)
       mode = 'release'
-      shard_index = web_pattern.group(3)
-      total_shards = web_pattern.group(4)
+      shard_index = web_pattern.group(4)
+      total_shards = web_pattern.group(5)
     elif dart2js_pattern:
       compiler = 'dart2js'
       runtime = 'd8'
       system = dart2js_pattern.group(1)
       mode = dart2js_pattern.group(2)
       # The valid naming parts for checked and host-checked are:
       # Empty: checked=False, host_checked=False
       # -checked: checked=True, host_checked=False
       # -host-checked: checked=False, host_checked=True
       # -checked-host-checked: checked=True, host_checked=True
@@ skipping 279 matching lines @@
   if (status == 0 and system == 'linux' and runtime == 'chrome'):
     status = TestCompiler(runtime, mode, system, test_flags + ['--checked'],
                           is_buildbot)
 
   if runtime != 'd8': CleanUpTemporaryFiles(system, runtime)
   if status != 0: print '@@@STEP_FAILURE@@@'
   return status
 
 if __name__ == '__main__':
   sys.exit(main())