[chromedriver] Only delete temp files that start with "chromedriver_".

chrome/test/chromedriver/util.py

 # Copyright (c) 2012 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.
 
 """Generic utilities for all python scripts."""
 
 import atexit
 import httplib
 import os
 import signal
@@ skipping 69 matching lines @@
   The temporary directory is automatically deleted when the python interpreter
   exits normally.
 
   Args:
     parent_dir: the directory to create the temp dir in. If None, the system
                 temp dir is used.
 
   Returns:
     The absolute path to the temporary directory.
   """
-  path = tempfile.mkdtemp(dir=parent_dir)
+  path = tempfile.mkdtemp(prefix='chromedriver_', dir=parent_dir)
   atexit.register(MaybeDelete, path)
   return path
 
 
 def Zip(path):
   """Zips the given path and returns the zipped file."""
   zip_path = os.path.join(MakeTempDir(), 'build.zip')
   f = zipfile.ZipFile(zip_path, 'w', zipfile.ZIP_DEFLATED)
   f.write(path, os.path.basename(path))
   f.close()
@@ skipping 91 matching lines @@
 
 
 def AddLink(label, url):
   """Adds a link with name |label| linking to |url| to current buildbot step.
 
   Args:
     label: A string with the name of the label.
     url: A string of the URL.
   """
   print '@@@STEP_LINK@%s@%s@@@' % (label, url)