Remove the mode flag for clobbering - we will now just nuke the complete output directory.

tools/bots/bot.py

 #!/usr/bin/python
 
 # Copyright (c) 2012, 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.
 
 """
 Shared code for use in the buildbot scripts.
 """
 
@@ skipping 119 matching lines @@
     print 'Could not handle unfamiliar bot name "%s".' % name
     sys.exit(1)
 
   # Print out the buildinfo for easy debugging.
   build_info.PrintBuildInfo()
 
   # Make sure we are in the dart directory
   os.chdir(DART_PATH)
 
   try:
-    Clobber(build_info.mode)
+    Clobber()
     build_step(build_info)
 
     custom_steps(build_info)
   except OSError as e:
     sys.exit(e.errno)
 
   sys.exit(0)
 
 
 def GetBotName():
@@ skipping 13 matching lines @@
     return args.name, False
 
   name = os.environ.get(BUILDER_NAME)
   if not name:
     print 'Use -n $BUILDBOT_NAME for the bot you would like to emulate.'
     sys.exit(1)
 
   return name, True
 
 
-def Clobber(mode):
+def Clobber():
   """
   Clobbers the builder before we do the build, if appropriate.
 
   - mode: either 'debug' or 'release'
   """
   if os.environ.get(BUILDER_CLOBBER) != "1":
     return
 
   with BuildStep('Clobber'):
     cmd = [sys.executable,
-           './tools/clean_output_directory.py',
-           '--mode=' + mode]
+           './tools/clean_output_directory.py']
     print 'Clobbering %s' % (' '.join(cmd))
     RunProcess(cmd)
 
 
 def RunTest(name, build_info, targets, flags=None):
   """
   Runs test.py with the given settings.
   """
   if not flags:
     flags = []
@@ skipping 33 matching lines @@
   if exit_code != 0:
     raise OSError(exit_code)
 
 
 def GetStepName(name, flags):
   """
   Filters out flags with '=' as this breaks the /stats feature of the buildbot.
   """
   flags = [x for x in flags if not '=' in x]
   return ('%s tests %s' % (name, ' '.join(flags))).strip()