Convert sky_server over to a go-based http server.

sky/tools/skydb

 #!/usr/bin/env python
 # Copyright 2014 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 argparse
 import logging
 import os
 from skypy.paths import Paths
 import skypy.configuration as configuration
@@ skipping 32 matching lines @@
             logging.warn(
                 '%s is outside of mojo root, using %s as server root' %
                 (path, server_root))
         relative_path = os.path.relpath(path, server_root)
 
         if self._port_in_use(HTTP_PORT):
             logging.warn(
                 'Port %s already in use, assuming custom sky_server started.' %
                 HTTP_PORT)
         else:
+            subprocess.call(os.path.join(self.paths.sky_tools_directory,
+                'download_sky_server'))
             server_command = [
-                os.path.join(self.paths.sky_tools_directory, 'sky_server'),
+                os.path.join(self.paths.src_root, 'out', 'downloads', 'sky_server'),
                 '-t', configuration,
                 server_root,
                 str(HTTP_PORT),
             ]
             self._sky_server = subprocess.Popen(server_command)
         return 'http://localhost:%s/%s' % (HTTP_PORT, relative_path)
 
     def _in_chromoting(self):
         return os.environ.get('CHROME_REMOTE_DESKTOP_SESSION', False)
 
@@ skipping 40 matching lines @@
 
 
 if __name__ == '__main__':
     skydb = SkyDebugger()
     try:
         skydb.main()
     except (KeyboardInterrupt, SystemExit):
         pass
     finally:
         skydb.shutdown()