Add a unit test to breakpad.

breakpad.py

 # 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.
 
 """Breakpad for Python.
 
 Sends a notification when a process stops on an exception.
 
 It is only enabled when all these conditions are met:
   1. hostname finishes with '.google.com' or 'chromium.org'
@@ skipping 71 matching lines @@
     params = {
         'args': sys.argv,
         'stack': stack[0:4096],
         'user': getpass.getuser(),
         'exception': FormatException(last_tb),
         'host': _HOST_NAME,
         'cwd': os.getcwd(),
         'version': sys.version,
     }
     # pylint: disable=W0702
-    print('\n'.join('  %s: %s' % (k, v[0:maxlen])
-                    for k, v in params.iteritems()))
+    print('\n'.join('  %s: %s' % (k, params[k][0:maxlen])
+                    for k in sorted(params)))
     print(post(url, params))
   except IOError:
     print('There was a failure while trying to send the stack trace. Too bad.')
 
 
 def SendProfiling(url=None):
   try:
     if not url:
       url = DEFAULT_URL + '/profiling'
     params = {
@@ skipping 31 matching lines @@
 
 # Skip unit tests and we don't want anything from non-googler.
 if (not 'test' in getattr(sys.modules['__main__'], '__file__', '') and
     not 'NO_BREAKPAD' in os.environ and
     (_HOST_NAME.endswith('.google.com') or
      _HOST_NAME.endswith('.chromium.org'))):
   Register()
 
 # Uncomment this line if you want to test it out.
 #Register()