bisect_build: Restore Python 2.5 compatibility.

tools/bisect-builds.py

 #!/usr/bin/python
 # Copyright (c) 2011 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.
 
 """Snapshot Build Bisect Tool
 
 This script bisects a snapshot archive using binary search. It starts at
 a bad revision (it will try to guess HEAD) and asks for a last known-good
 revision. It will then binary search across this revision range by downloading,
@@ skipping 193 matching lines @@
   @param context A PathContext instance.
   @param rev The Chromium revision number/tag to download.
   @param filename The destination for the downloaded file.
   @param quit_event A threading.Event which will be set by the master thread to
                     indicate that the download should be aborted.
   @param progress_event A threading.Event which will be set by the master thread
                     to indicate that the progress of the download should be
                     displayed.
   """
   def ReportHook(blocknum, blocksize, totalsize):
-    if quit_event and quit_event.is_set():
+    if quit_event and quit_event.isSet():
      raise RuntimeError("Aborting download of revision %d" % rev)
-    if progress_event and progress_event.is_set():
+    if progress_event and progress_event.isSet():
       size = blocknum * blocksize
       if totalsize == -1:  # Total size not known.
         progress = "Received %d bytes" % size
       else:
         size = min(totalsize, size)
         progress = "Received %d of %d bytes, %.2f%%" % (
             size, totalsize, 100.0 * size / totalsize)
       # Send a \r to let all progress messages use just one line of output.
       sys.stdout.write("\r" + progress)
       sys.stdout.flush()
 
   download_url = context.GetDownloadURL(rev)
   try:
     urllib.urlretrieve(download_url, filename, ReportHook)
-    if progress_event and progress_event.is_set():
+    if progress_event and progress_event.isSet():
       print()
   except RuntimeError, e:
     pass
 
 
 def RunRevision(context, revision, zipfile, profile, args):
   """Given a zipped revision, unzip it and run the test."""
   print "Trying revision %d..." % revision
 
   # Create a temp directory and unzip the revision into it.
@@ skipping 252 matching lines @@
 
   # We're done. Let the user know the results in an official manner.
   print('You are probably looking for build %d.' % first_known_bad_rev)
   print('CHANGELOG URL:')
   print(CHANGELOG_URL % (last_known_good_rev, first_known_bad_rev))
   print('Built at revision:')
   print(BUILD_VIEWVC_URL % first_known_bad_rev)
 
 if __name__ == '__main__':
   sys.exit(main())