[chromedriver] Remove _CleanTmpDir and use $TMPDIR directly on bots.

chrome/test/chromedriver/run_buildbot_steps.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 """Runs all the buildbot steps for ChromeDriver except for update/compile."""
 
 import bisect
 import csv
 import datetime
@@ skipping 359 matching lines @@
   util.MarkBuildStepStart('updating LATEST_RELEASE to %s' % version)
 
   temp_latest_release_fname = tempfile.mkstemp()[1]
   with open(temp_latest_release_fname, 'w') as f:
     f.write(version)
   if slave_utils.GSUtilCopy(temp_latest_release_fname, latest_release_url,
                             mimetype='text/plain'):
     util.MarkBuildStepError()
 
 
-def _CleanTmpDir():
-  tmp_dir = tempfile.gettempdir()
-  print 'cleaning temp directory:', tmp_dir
-  for file_name in os.listdir(tmp_dir):
-    file_path = os.path.join(tmp_dir, file_name)
-    if file_name.startswith('chromedriver_'):
-      if os.path.isdir(file_path):
-        print 'deleting sub-directory', file_path
-        shutil.rmtree(file_path, True)
-      else:
-        print 'deleting file', file_path
-        os.remove(file_path)
-
-
 def _WaitForLatestSnapshot(commit_position):
   util.MarkBuildStepStart('wait_for_snapshot')
   for attempt in range(0, 200):
     snapshot_position = archive.GetLatestSnapshotPosition()
     if commit_position is not None and snapshot_position is not None:
       if int(snapshot_position) >= int(commit_position):
         break
       util.PrintAndFlush('Waiting for snapshot >= %s, found %s' %
                          (commit_position, snapshot_position))
     time.sleep(60)
@@ skipping 44 matching lines @@
       help='Update the test results log (only applicable to Android)')
   options, _ = parser.parse_args()
 
   bitness = '32'
   if util.Is64Bit():
     bitness = '64'
   platform = '%s%s' % (util.GetPlatformName(), bitness)
   if options.android_packages:
     platform = 'android'
 
-  _CleanTmpDir()
-
-  # Make sure any subprocesses (i.e. chromedriver) create temp files under
-  # $TMPDIR/chromedriver_*, so that they can be cleaned up by _CleanTempDir().
-  if util.IsWindows():
-    os.environ['TMP'] = os.environ['TEMP'] = util.MakeTempDir()
-  else:
-    os.environ['TMPDIR'] = util.MakeTempDir()
-
   if not options.revision:
     commit_position = None
   else:
     commit_position = archive.GetCommitPositionFromGitHash(options.revision)
 
   if platform == 'android':
     if not options.revision and options.update_log:
       parser.error('Must supply a --revision with --update-log')
     _DownloadPrebuilts()
   else:
@@ skipping 30 matching lines @@
     util.MarkBuildStepStart('run_all_tests.py')
     util.MarkBuildStepError()
 
   # Add a "cleanup" step so that errors from runtest.py or bb_device_steps.py
   # (which invoke this script) are kept in their own build step.
   util.MarkBuildStepStart('cleanup')
 
 
 if __name__ == '__main__':
   main()