Support dev servers defined in a mojoconfig file.

mojo/devtools/common/devtoolslib/http_server.py

 # Copyright 2015 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.
 
 import atexit
 import datetime
 import email.utils
 import errno
 import gzip
 import hashlib
@@ skipping 179 matching lines @@
   assert mappings
   handler_class = _GetHandlerClassForPath(mappings)
 
   try:
     httpd = _SilentTCPServer(('127.0.0.1', host_port), handler_class)
     atexit.register(httpd.shutdown)
 
     http_thread = threading.Thread(target=httpd.serve_forever)
     http_thread.daemon = True
     http_thread.start()
-    print 'Started http://%s:%d to host %s.' % (httpd.server_address[0],
-                                                httpd.server_address[1],
-                                                str(mappings))
     return httpd.server_address
   except socket.error as v:
     error_code = v[0]
     print 'Failed to start http server for %s on port %d: %s.' % (
         str(mappings), host_port, os.strerror(error_code))
     if error_code == errno.EADDRINUSE:
       print ('  Run `fuser %d/tcp` to find out which process is using the port.'
              % host_port)
     print '---'
     raise