Reduce DRP telemetry tests' dependence on net-internals#proxy.

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 integration_tests import chrome_proxy_metrics as metrics
 from metrics import loading
@@ skipping 292 matching lines @@
     # Attempt to load a page through the nonexistent primary proxy in order to
     # cause a proxy fallback, and have this test run starting from the HTTP
     # fallback proxy.
     tab.Navigate(_TEST_SERVER_DEFAULT_URL)
     tab.WaitForJavaScriptExpression('performance.timing.loadEventStart', 300)
 
     proxies = [
         'nonexistent.googlezip.net:80',
         self._metrics.effective_proxies['fallback'],
         self._metrics.effective_proxies['direct']]
+    # TODO(sclittle): Remove this dependency on net-internals#proxy once an
+    # alternative method of verifying that Chrome is on the fallback proxy
+    # exists.
     self._metrics.VerifyProxyInfo(tab, proxies, proxies[:1])
 
   def AddResults(self, tab, results):
     self._metrics.AddResultsForHTTPToDirectFallback(tab, results)
 
 
 class ChromeProxyExplicitBypass(ChromeProxyValidation):
   """Correctness measurement for explicit proxy bypasses.
 
   In this test, the configured proxy is the chromeproxy-test server which
@@ skipping 65 matching lines @@
             ],
         'bypass': [self._metrics.AddResultsForBypass],
         'safebrowsing': [self._metrics.AddResultsForSafebrowsing],
         }
     if not self._page.name in page_to_metrics:
       raise page_test.MeasurementFailure(
           'Invalid page name (%s) in smoke. Page name must be one of:\n%s' % (
           self._page.name, page_to_metrics.keys()))
     for add_result in page_to_metrics[self._page.name]:
       add_result(tab, results)