Support mapping multiple local paths under the same url prefix.

mojo/devtools/common/devtoolslib/linux_shell.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 subprocess
 import threading
 
 from devtoolslib import http_server
 from devtoolslib.shell import Shell
 from devtoolslib.utils import overrides
 
 
 class LinuxShell(Shell):
   """Wrapper around Mojo shell running on Linux.
 
   Args:
     executable_path: path to the shell binary
     command_prefix: optional list of arguments to prepend to the shell command,
         allowing e.g. to run the shell under debugger.
   """
 
   def __init__(self, executable_path, command_prefix=None):
     self.executable_path = executable_path
     self.command_prefix = command_prefix if command_prefix else []
 
   @overrides(Shell)
   def serve_local_directory(self, local_dir_path, port=0):
-    mappings = [('', local_dir_path)]
+    mappings = [('', [local_dir_path])]
     return 'http://%s:%d/' % http_server.start_http_server(mappings, port)
 
   @overrides(Shell)
   def serve_local_directories(self, mappings, port=0):
     return 'http://%s:%d/' % http_server.start_http_server(mappings, port)
 
   @overrides(Shell)
   def forward_host_port_to_shell(self, host_port):
     pass
 
@@ skipping 18 matching lines @@
       (Results.output, _) = p.communicate()
 
     run_thread = threading.Thread(target=do_run)
     run_thread.start()
     run_thread.join(timeout)
 
     if run_thread.is_alive():
       p.terminate()
       return p.returncode, Results.output, True
     return p.returncode, Results.output, False