[telemetry] Add a webdriver backend with support for IE.

tools/telemetry/telemetry/core/wpr_server.py

 # Copyright (c) 2012 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 os
 import sys
 
 from telemetry.core import util
 
 # Get chrome/test/functional scripts into our path.
 # TODO(tonyg): Move webpagereplay.py to a common location.
@@ skipping 35 matching lines @@
       else:
         options.append('--record')
     if not make_javascript_deterministic:
       options.append('--inject_scripts=')
     self._web_page_replay = webpagereplay.ReplayServer(
         path,
         self._webpagereplay_host,
         self._webpagereplay_local_http_port,
         self._webpagereplay_local_https_port,
         options)
+    if browser_backend.webdriver_based:

[nduca, 2013/07/30 06:49:45]

lets do this by constructing the options list first,and

browser_backend.CustomizeReplayServerWithOptions(options)

Then create the replay server.

That lets the backends have a last-second chance to customize the server, and
you avoid the webdriver_based flag

[chrisgao (Use stgao instead), 2013/07/31 19:05:41]

Good idea.
Done. But we need to override
webpagereplay.ReplayServer._AddDefaultReplayOptions.

+      self._web_page_replay.replay_options.remove('--no-dns_forwarding')
     self._web_page_replay.StartServer()
 
   def __enter__(self):
     return self
 
   def __exit__(self, *args):
     self.Close()
 
   def Close(self):
     if self._forwarder:
       self._forwarder.Close()
       self._forwarder = None
     if self._web_page_replay:
       self._web_page_replay.StopServer()
       self._web_page_replay = None