Added integration test to Chrome Proxy to verify direct connection on remote site timeout

tools/chrome_proxy/integration_tests/chrome_proxy_measurements.py

 # Copyright 2014 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 base64
 import logging
 import urlparse
 
 from common import chrome_proxy_measurements as measurements
 from common.chrome_proxy_measurements import ChromeProxyValidation
 from integration_tests import chrome_proxy_metrics as metrics
 from metrics import loading
 from telemetry.core import exceptions, util
 from telemetry.page import page_test
 
+class ChromeProxyBypassOnTimeout(ChromeProxyValidation):
+  """Checks the client bypasses when endpoint site times out."""
+
+  def __init__(self):
+    super(ChromeProxyBypassOnTimeout, self).__init__(
+        restart_after_each_page=True,
+        metrics=metrics.ChromeProxyMetric())
+
+  def CustomizeBrowserOptions(self, options):
+    super(ChromeProxyBypassOnTimeout, self).CustomizeBrowserOptions(
+        options)
+
+  def AddResults(self, tab, results):
+    self._metrics.AddResultsForBypassOnTimeout(tab, results)
 
 class ChromeProxyDataSaving(page_test.PageTest):
   """Chrome proxy data saving measurement."""
   def __init__(self, *args, **kwargs):
     super(ChromeProxyDataSaving, self).__init__(*args, **kwargs)
     self._metrics = metrics.ChromeProxyMetric()
     self._enable_proxy = True
 
   def CustomizeBrowserOptions(self, options):
     if self._enable_proxy:
@@ skipping 644 matching lines @@
         metrics=metrics.ChromeProxyMetric())
 
   def CustomizeBrowserOptions(self, options):
     super(ChromeProxyPingback, self).CustomizeBrowserOptions(options)
     options.AppendExtraBrowserArgs(
       '--enable-data-reduction-proxy-force-pingback')
     options.AppendExtraBrowserArgs(
       '--enable-stats-collection-bindings')
 
   def AddResults(self, tab, results):
-    self._metrics.AddResultsForPingback(tab, results)
+    self._metrics.AddResultsForPingback(tab, results)