[chromedriver] Prefix server logs with chromedriver_log_.

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 49 matching lines @@
   if slave_utils.GSUtilCopy(
       zip_path,
       '%s/%s' % (GS_PREBUILTS_URL, 'r%s.zip' % commit_position)):
     util.MarkBuildStepError()
 
 
 def _ArchiveServerLogs():
   """Uploads chromedriver server logs to google storage."""
   util.MarkBuildStepStart('archive chromedriver server logs')
   for server_log in glob.glob(os.path.join(tempfile.gettempdir(),
-                                           'chromedriver_*')):
-    base_name = os.path.basename(server_log)
-    util.AddLink(base_name, '%s/%s' % (SERVER_LOGS_LINK, base_name))
-    slave_utils.GSUtilCopy(
-        server_log,
-        '%s/%s' % (GS_SERVER_LOGS_URL, base_name),
-        mimetype='text/plain')
+                                           'chromedriver_log_*')):
+    if os.path.isfile(server_log):
+      base_name = os.path.basename(server_log)
+      util.AddLink(base_name, '%s/%s' % (SERVER_LOGS_LINK, base_name))
+      slave_utils.GSUtilCopy(
+          server_log,
+          '%s/%s' % (GS_SERVER_LOGS_URL, base_name),
+          mimetype='text/plain')
 
 
 def _DownloadPrebuilts():
   """Downloads the most recent prebuilts from google storage."""
   util.MarkBuildStepStart('Download latest chromedriver')
 
   zip_path = os.path.join(util.MakeTempDir(), 'build.zip')
   if gsutil_download.DownloadLatestFile(GS_PREBUILTS_URL,
                                         GS_PREBUILTS_URL + '/r',
                                         zip_path):
@@ skipping 461 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()