Add lite page BTF test

tools/chrome_proxy/webdriver/common.py

 # Copyright 2016 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 argparse
 import json
 import logging
 import os
 import re
 import socket
@@ skipping 396 matching lines @@
     """
     histogram = {}
     while(not histogram and sleep_intervals > 0):
       histogram = self.GetHistogram(histogram_name, 5)
       if (not histogram):
         time.sleep(1)
         sleep_intervals -= 1
 
     return bool(histogram)
 
-  def GetHTTPResponses(self, include_favicon=False, skip_domainless_pages=True):
+  def GetHTTPResponses(self, include_favicon=False, skip_domainless_pages=True,
+      override_has_logs=False):
     """Parses the Performance Logs and returns a list of HTTPResponse objects.
 
     Use caution when calling this function  multiple times. Only responses
     since the last time this function was called are returned (or since Chrome
     started, whichever is later). An Exception will be raised if no page was
     loaded since the last time this function was called.
 
     Args:
       include_favicon: A bool that if True will include responses for favicons.
       skip_domainless_pages: If True, only responses with a net_loc as in RFC
         1808 will be included. Pages such as about:blank will be skipped.
+      override_has_logs: Allows the _has_logs property to be set if there was
+        not a page load but an XHR was expected instead.
     Returns:
       A list of HTTPResponse objects, each representing a single completed HTTP
       transaction by Chrome.
     """
+    if override_has_logs:
+      self._has_logs = True
     def MakeHTTPResponse(log_dict):
       params = log_dict['params']
       response_dict = params['response']
       http_response_dict = {
         'response_headers': response_dict['headers'] if 'headers' in
           response_dict else {},
         'request_headers': response_dict['requestHeaders'] if 'requestHeaders'
           in response_dict else {},
         'url': response_dict['url'] if 'url' in response_dict else '',
         'protocol': response_dict['protocol'] if 'protocol' in response_dict
@@ skipping 226 matching lines @@
     for test_suite in test_suite_iter:
       for test_case in test_suite:
         for test in test_case:
           # Drop the file name in the form <filename>.<classname>.<methodname>
           test_id = test.id()[test.id().find('.') + 1:]
           if re.match(test_filter_re, test_id):
             tests.addTest(test)
     testRunner = unittest.runner.TextTestRunner(verbosity=2,
       failfast=flags.failfast, buffer=(not flags.disable_buffer))
     testRunner.run(tests)