Introduce --cancel-first-run and reduce the strength of --no-first-run.

chrome/test/functional/perf.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.
 
 """Basic pyauto performance tests.
 
 For tests that need to be run for multiple iterations (e.g., so that average
 and standard deviation values can be reported), the default number of iterations
 run for each of these tests is specified by |_DEFAULT_NUM_ITERATIONS|.
@@ skipping 2284 matching lines @@
       WEBPAGEREPLAY_HTTP_PORT,
       WEBPAGEREPLAY_HTTPS_PORT) + [
           '--log-level=0',
           '--disable-background-networking',
           '--enable-experimental-extension-apis',
           '--enable-logging',
           '--enable-benchmarking',
           '--enable-net-benchmarking',
           '--metrics-recording-only',
           '--activate-on-launch',
-          '--no-first-run',
+          '--skip-first-run',
           '--no-proxy-server',
           ]
 
   @classmethod
   def Path(cls, key, **kwargs):
     return FormatChromePath(cls._PATHS[key], **kwargs)
 
   @classmethod
   def ReplayServer(cls, test_name, replay_options=None):
     archive_path = cls.Path('archive', test_name=test_name)
@@ skipping 378 matching lines @@
     """Identifies the port number to which the server is currently bound.
 
     Returns:
       The numeric port number to which the server is currently bound.
     """
     return self._server.server_address[1]
 
 
 if __name__ == '__main__':
   pyauto_functional.Main()