mojo_run: support parallel Android runs of mojo_run.

mojo/devtools/common/devtoolslib/shell_config.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.
 
 """Configuration for the shell abstraction.
 
 This module declares ShellConfig and knows how to compute it from command-line
 arguments, applying any default paths inferred from the checkout, configuration
 file, etc.
 """
@@ skipping 19 matching lines @@
     self.map_origin_list = []
     self.dev_servers = []
     self.content_handlers = dict()
     self.verbose = None
 
     # Android-only.
     self.adb_path = None
     self.target_device = None
     self.logcat_tags = None
     self.require_root = False
+    self.free_host_ports = False
 
     # Desktop-only.
     self.use_osmesa = None
 
 
 class DevServerConfig(object):
   """Configuration for a development server running on a host and available to
   the shell.
   """
   def __init__(self):
@@ skipping 20 matching lines @@
                       '<origin>=<url-or-local-file-path>')
   parser.add_argument('-v', '--verbose', action="store_true",
                       help="Increase output verbosity")
 
   android_group = parser.add_argument_group('Android-only',
       'These arguments apply only when --android is passed.')
   android_group.add_argument('--adb-path', help='Path of the adb binary.')
   android_group.add_argument('--target-device', help='Device to run on.')
   android_group.add_argument('--logcat-tags', help='Comma-separated list of '
                              'additional logcat tags to display.')
+  android_group.add_argument('--free-host-ports', action='store_true',
+                             help='Use system-allocated ports on the host when '
+                             'spawning local servers.')
 
   desktop_group = parser.add_argument_group('Desktop-only',
       'These arguments apply only when running on desktop.')
   desktop_group.add_argument('--use-osmesa', action='store_true',
                              help='Configure the native viewport service '
                              'for off-screen rendering.')
 
   config_file_group = parser.add_argument_group('Configuration file',
       'These arguments allow to modify the behavior regarding the mojoconfig '
       'file.')
@@ skipping 59 matching lines @@
   shell_config.origin = script_args.origin
   shell_config.map_url_list = script_args.map_url
   shell_config.map_origin_list = script_args.map_origin
   shell_config.verbose = script_args.verbose
 
   # Android-only.
   shell_config.adb_path = (script_args.adb_path or inferred_paths['adb_path'] or
                            'adb')
   shell_config.target_device = script_args.target_device
   shell_config.logcat_tags = script_args.logcat_tags
+  shell_config.free_host_ports = script_args.free_host_ports
 
   # Desktop-only.
   shell_config.use_osmesa = script_args.use_osmesa
 
   if (shell_config.android and not shell_config.origin and
       inferred_paths['build_dir_path']):
     shell_config.origin = inferred_paths['build_dir_path']
 
   # Read the mojoconfig file.
   config_file = script_args.config_file
@@ skipping 37 matching lines @@
 
     if 'content_handlers' in config:
       try:
         for (mime_type,
              content_handler_url) in config['content_handlers'].iteritems():
           shell_config.content_handlers[mime_type] = content_handler_url
       except (ValueError, KeyError):
         raise ShellConfigurationException('Failed to parse content_handlers in '
                                           'the config file.')
   return shell_config