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

tools/telemetry/telemetry/browser_finder.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.
 """Finds browsers that can be controlled by telemetry."""
 
 import logging
 
 from telemetry import android_browser_finder
 from telemetry import cros_browser_finder
 from telemetry import desktop_browser_finder
@@ skipping 35 matching lines @@
       x_idx = types.index(x.browser_type)
       y_idx = types.index(y.browser_type)
       return x_idx - y_idx
     browsers.sort(compare_browsers_on_type_priority)
     if len(browsers) >= 1:
       return browsers[0]
     else:
       return None
 
   matching_browsers = [b for b in browsers
-                       if b.browser_type == options.browser_type]
+      if b.browser_type == options.browser_type and
+         (len(options.extensions_to_load) == 0 or b.supports_extensions)]
 
   if len(matching_browsers) == 1:
     return matching_browsers[0]
   elif len(matching_browsers) > 1:
     logging.warning('Multiple browsers of the same type found: %s' % (
                     repr(matching_browsers)))
     return matching_browsers[0]
   else:
     return None
 
 def GetAllAvailableBrowserTypes(options):
   """Returns an array of browser types supported on this system."""
   browsers = []
   browsers.extend(desktop_browser_finder.FindAllAvailableBrowsers(options))
   browsers.extend(android_browser_finder.FindAllAvailableBrowsers(options))
   browsers.extend(cros_browser_finder.FindAllAvailableBrowsers(options))
 
   type_list = set([browser.browser_type for browser in browsers])
   type_list = list(type_list)
   type_list.sort()
   return type_list