Fix syntax error in dartium archiving script

tools/dartium/upload_steps.py

 #!/usr/bin/python
 
 # Copyright (c) 2014 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.
 
 """Steps to archive dartium, content_shell, and chromedriver from buildbots.
 
 Imported by buildbot_annotated_steps.py and multivm_archive.py
 """
@@ skipping 49 matching lines @@
     self.name = os.environ[BUILDER_NAME]
     pattern = re.match(NEW_BUILDER_PATTERN, self.name)
     if pattern:
       self.arch = pattern.group(2)
       self.mode = 'Release'
       self.is_incremental = (pattern.group(3) == '-inc')
       self.is_full = not self.is_incremental
       self.channel = pattern.group(4)
     else:
       pattern = re.match(BUILDER_PATTERN, self.name)
-      assert pattern:
+      assert pattern
       self.arch = 'x64' if pattern.group(2) == 'lucid64' else 'ia32'
       self.mode = 'Debug' if pattern.group(3) == 'debug' else 'Release'
       self.is_incremental = '-inc' in self.name
       self.is_full = pattern.group(3) == 'full'
       self.channel = pattern.group(6) if pattern.group(6) else 'be'
 
 
 def ArchiveAndUpload(info, archive_latest=False):
   print '@@@BUILD_STEP dartium_generate_archive@@@'
   cwd = os.getcwd()
@@ skipping 189 matching lines @@
 def RemoveArchives(archives):
   """Remove the list of archives in Google storage.
   """
   for archive in archives:
     if archive.find(GS_SITE) == 0:
       cmd = [GSUTIL, 'rm', archive.rstrip()]
       (status, _) = ExecuteCommand(cmd)
       if status != 0:
         return status
   return 0