Update experiment test to only verify /exptest/... are bypassed

tools/chrome_proxy/integration_tests/chrome_proxy_metrics.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 logging
 import time
 
 from common import chrome_proxy_metrics
 from common import network_metrics
 from common.chrome_proxy_metrics import ChromeProxyMetricException
@@ skipping 243 matching lines @@
       raise ChromeProxyMetricException, (
           'Expected at least one LoFi response, but zero such responses were '
           'received.')
 
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'lo_fi_request', 'count', lo_fi_request_count))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'lo_fi_response', 'count', lo_fi_response_count))
     super(ChromeProxyMetric, self).AddResults(tab, results)
 
-  def AddResultsForBypass(self, tab, results):
+  def AddResultsForBypass(self, tab, results, url_pattern=""):
     bypass_count = 0
+    skipped_count = 0
 
     for resp in self.IterResponses(tab):
+      # Only check the url's that contain the specified pattern

[sclittle, 2015/05/19 22:17:45]

nit: add period at end of comment

[bustamante, 2015/05/19 22:26:08]

Done.

+      if url_pattern and url_pattern not in resp.response.url:
+        skipped_count += 1
+        continue
+
       if resp.HasChromeProxyViaHeader():
         r = resp.response
         raise ChromeProxyMetricException, (
             '%s: Should not have Via header (%s) (refer=%s, status=%d)' % (
                 r.url, r.GetHeader('Via'), r.GetHeader('Referer'), r.status))
       bypass_count += 1
 
     if bypass_count == 0:
       raise ChromeProxyMetricException, (
           'Expected at least one response to be bypassed, but zero such '
           'responses were received.')
+
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'bypass', 'count', bypass_count))
+    results.AddValue(scalar.ScalarValue(
+        results.current_page, 'skipped', 'count', skipped_count))
 
   def AddResultsForCorsBypass(self, tab, results):
     eligible_response_count = 0
     bypass_count = 0
     bypasses = {}
     for resp in self.IterResponses(tab):
       logging.warn('got a resource %s' % (resp.response.url))
 
     for resp in self.IterResponses(tab):
       if resp.ShouldHaveChromeProxyViaHeader():
@@ skipping 219 matching lines @@
         via_count += 1
     if via_count == 0:
       raise ChromeProxyMetricException, (
           'Expected at least one response through the proxy after the bypass '
           'expired, but zero such responses were received.')
 
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'bypass', 'count', bypass_count))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'via', 'count', via_count))