[pyauto] Force plugin load at startup

chrome/test/pyautolib/pyauto.py

 #!/usr/bin/env python
 # 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.
 
 """PyAuto: Python Interface to Chromium's Automation Proxy.
 
 PyAuto uses swig to expose Automation Proxy interfaces to Python.
 For complete documentation on the functionality available,
 run pydoc on this file.
@@ skipping 176 matching lines @@
         named_channel_id = self.EnableChromeTestingOnChromeOS()
     else:
       self._SetExtraChromeFlags()  # Flags already previously set for ChromeOS.
     if named_channel_id:
       self._named_channel_id = named_channel_id
       self.UseNamedChannelID(named_channel_id)
     # Initialize automation and fire the browser (does not fire the browser
     # on ChromeOS).
     self.SetUp()
 
+    # Forcibly trigger all plugins to get registered.  crbug.com/94123
+    # Sometimes flash files loaded too quickly after firing browser
+    # ends up getting downloaded, which seems to indicate that the plugin
+    # hasn't been registered yet.
+    self.GetPluginsInfo()
+
     # TODO(dtu): Remove this after crosbug.com/4558 is fixed.
     if self.IsChromeOS():
       self.WaitUntil(lambda: not self.GetNetworkInfo()['offline_mode'])
 
     # If we are connected to any RemoteHosts, create PyAuto
     # instances on the remote sides and set them up too.
     for remote in self.remotes:
       remote.CreateTarget(self)
       remote.setUp()
 
@@ skipping 4646 matching lines @@
     successful = result.wasSuccessful()
     if not successful:
       pyauto_tests_file = os.path.join(self.TestsDir(), self._tests_filename)
       print >>sys.stderr, 'Tests can be disabled by editing %s. ' \
                           'Ref: %s' % (pyauto_tests_file, _PYAUTO_DOC_URL)
     sys.exit(not successful)
 
 
 if __name__ == '__main__':
   Main()