Shallow HTTPError exceptions so they aren't logged in breakpad.

gcl.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 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.
 
 """\
 Wrapper script around Rietveld's upload.py that simplifies working with groups
 of files.
 """
 
@@ skipping 1290 matching lines @@
   if not argv:
     argv = ['help']
   command = Command(argv[0])
   # Help can be run from anywhere.
   if command == CMDhelp:
     return command(argv[1:])
 
   try:
     GetRepositoryRoot()
   except gclient_utils.Error:
-    print('To use gcl, you need to be in a subversion checkout.')
+    print >> sys.stderr, 'To use gcl, you need to be in a subversion checkout.'
     return 1
 
   # Create the directories where we store information about changelists if it
   # doesn't exist.
   try:
     if not os.path.exists(GetInfoDir()):
       os.mkdir(GetInfoDir())
     if not os.path.exists(GetChangesDir()):
       os.mkdir(GetChangesDir())
     if not os.path.exists(GetCacheDir()):
       os.mkdir(GetCacheDir())
 
     if command:
       return command(argv[1:])
     # Unknown command, try to pass that to svn
     return CMDpassthru(argv)
   except gclient_utils.Error, e:
-    print('Got an exception')
-    print(str(e))
+    print >> sys.stderr, 'Got an exception'
+    print >> sys.stderr, str(e)
+    return 1
+  except urllib2.HTTPError, e:
+    if e.code != 500:
+      raise
+    print >> sys.stderr, (
+        'AppEngine is misbehaving and returned HTTP %d, again. Keep faith '
+        'and retry or visit go/isgaeup.\n%s') % (e.code, e.reason)
+    return 1
+
 
 if __name__ == "__main__":
   sys.exit(main(sys.argv[1:]))