Adding the performance and browser benchmarking script.

tools/testing/architecture.py

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. 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 platform
 import re
 import shutil
 import subprocess
@@ skipping 431 matching lines @@
     elif 'ie' in flags or 'explorer' in flags or 'internet-explorer' in flags:
       browser_flag = 'ie'
 
     selenium_location = os.path.join(self.root_path, 'tools', 'testing',
                                 'run_selenium.py')
     
     html_output_file = os.path.join(self.GetHtmlPath(), self.GetHtmlName())
     f = open(html_output_file, 'w')
     f.write(self.GetHtmlContents())
     f.close()
-    return [selenium_location, html_output_file, browser_flag]
+    return [selenium_location, html_output_file, browser_flag, str(10)]
 
 
 class StandaloneArchitecture(Architecture):
   """Base class for architectures that run tests without a browser."""
 
   def __init__(self, root_path, arch, mode, component, test):
     super(StandaloneArchitecture, self).__init__(root_path, arch, mode, component,
                                                  test)
 
   def GetExecutable(self):
@@ skipping 99 matching lines @@
     return WebDriverArchitecture(root_path, arch, mode, component, test)
 
   elif component in ['vm', 'frog', 'frogsh']:
     return StandaloneArchitecture(root_path, arch, mode, component, test)
 
   elif component == 'leg':
     return LegArchitecture(root_path, arch, mode, component, test)
 
   elif component == 'dartc':
     return DartcArchitecture(root_path, arch, mode, component, test)