Added a new test which aims to be really, really mean to WebRTC. Hopefully this will cover some cra…

chrome/test/functional/webrtc_test_base.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.
 
 import pyauto
 
 
 class WebrtcTestBase(pyauto.PyUITest):
   """This base class provides helpers for getUserMedia calls."""
 
+  def GetUserMedia(self, tab_index, action='allow'):
+    """Acquires webcam or mic for one tab and returns the result.
+
+    Args:
+      tab_index: The tab to request user media on.
+      action: The action to take on the info bar. Can be 'allow', 'deny' or
+          'dismiss'.
+
+    Returns:
+      A string as specified by the getUserMedia javascript function.
+    """
+    self.assertEquals('ok-requested', self.ExecuteJavascript(
+        'getUserMedia(true, true)', tab_index=tab_index))
+
+    self.WaitForInfobarCount(1, tab_index=tab_index)
+    self.PerformActionOnInfobar(action, infobar_index=0, tab_index=tab_index)
+    self.WaitForGetUserMediaResult(tab_index=0)
+
+    result = self.GetUserMediaResult(tab_index=0)
+    self.AssertNoFailures(tab_index)
+    return result
+
   def WaitForGetUserMediaResult(self, tab_index):
     """Waits until WebRTC has responded to a getUserMedia query.
 
     Fails an assert if WebRTC doesn't respond within the default timeout.
 
     Args:
       tab_index: the tab to query.
     """
     def HasResult():
       return self.GetUserMediaResult(tab_index) != 'not-called-yet'
     self.assertTrue(self.WaitUntil(HasResult),
                     msg='Timed out while waiting for getUserMedia callback.')
 
   def GetUserMediaResult(self, tab_index):
     """Retrieves WebRTC's answer to a user media query.
 
     Args:
       tab_index: the tab to query.
 
     Returns:
       Specified in obtainGetUserMediaResult() in getusermedia.js.
     """
     return self.ExecuteJavascript(
-        'obtainGetUserMediaResult()', tab_index=tab_index)
+        'obtainGetUserMediaResult()', tab_index=tab_index)
+
+  def AssertNoFailures(self, tab_index):
+    """Ensures the javascript hasn't registered any asynchronous errors.
+
+    Args:
+      tab_index: The tab to check.
+    """
+    self.assertEquals('ok-no-errors', self.ExecuteJavascript(
+        'getAnyTestFailures()', tab_index=tab_index))