Proof of concept for running extension API stack through dev tools.

tools/telemetry/telemetry/possible_browser.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.
 class PossibleBrowser(object):
   """A browser that can be controlled.
 
   Call Create() to launch the browser and begin manipulating it..
   """
 
-  def __init__(self, browser_type, options):
+  def __init__(self, browser_type, options, supports_extensions):
     self.browser_type = browser_type
     self._options = options
+    self._supports_extensions = supports_extensions
 
   def __repr__(self):
     return 'PossibleBrowser(browser_type=%s)' % self.browser_type
 
   @property
   def options(self):
     return self._options
 
+  @property
+  def supports_extensions(self):
+    return self._supports_extensions
+
   def Create(self):
     raise NotImplementedError()