net: add DNS certificate revocation experiment.

chrome/browser/chrome_browser_main.cc

 // 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.
 
 #include "chrome/browser/chrome_browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 37 matching lines @@
 #include "chrome/browser/jankometer.h"
 #include "chrome/browser/language_usage_metrics.h"
 #include "chrome/browser/metrics/field_trial_synchronizer.h"
 #include "chrome/browser/metrics/histogram_synchronizer.h"
 #include "chrome/browser/metrics/metrics_log.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/metrics/thread_watcher.h"
 #include "chrome/browser/metrics/tracking_synchronizer.h"
 #include "chrome/browser/nacl_host/nacl_process_host.h"
 #include "chrome/browser/net/chrome_net_log.h"
+#include "chrome/browser/net/chrome_network_delegate.h"
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "chrome/browser/plugin_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/pref_value_store.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/prerender/prerender_field_trial.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service_factory.h"
@@ skipping 931 matching lines @@
   // Create a 100% field trial based on the brand code.
   if (auto_launch_trial::IsInExperimentGroup(brand)) {
     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
                                            kAutoLaunchTrialAutoLaunchGroup);
   } else if (auto_launch_trial::IsInControlGroup(brand)) {
     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
                                            kAutoLaunchTrialControlGroup);
   }
 }
 
+void ChromeBrowserMainParts::ComodoDNSExperimentFieldTrial() {
+  // 100% probability of being in the experiment group until the timeout.
+  const base::FieldTrial::Probability kDivisor = 1;
+  const base::FieldTrial::Probability kProbability = 1;
+
+  // After April 15, 2012 builds, it will always be in default group.
+  scoped_refptr<base::FieldTrial> trial(
+      new base::FieldTrial("ComodoDNSExperiment", kDivisor,
+          "inactive", 2012, 4, 15));
+
+  const int active = trial->AppendGroup("active", kProbability);
+
+  if (trial->group() == active)
+    ChromeNetworkDelegate::EnableComodoDNSExperiment();
+}
+
 // ChromeBrowserMainParts: |SetupMetricsAndFieldTrials()| related --------------
 
 void ChromeBrowserMainParts::SetupFieldTrials(bool metrics_recording_enabled,
                                               bool proxy_policy_is_set) {
   // Note: make sure to call ConnectionFieldTrial() before
   // ProxyConnectionsFieldTrial().
   ConnectionFieldTrial();
   SocketTimeoutFieldTrial();
   // If a policy is defining the number of active connections this field test
   // shoud not be performed.
   if (!proxy_policy_is_set)
     ProxyConnectionsFieldTrial();
   prerender::ConfigurePrefetchAndPrerender(parsed_command_line());
   InstantFieldTrial::Activate();
   SpdyFieldTrial();
   ConnectBackupJobsFieldTrial();
   WarmConnectionFieldTrial();
   PredictorFieldTrial();
   DefaultAppsFieldTrial();
   AutoLaunchChromeFieldTrial();
+  ComodoDNSExperimentFieldTrial();
   AutocompleteFieldTrial::Activate();
   NewTabUI::SetupFieldTrials();
 }
 
 void ChromeBrowserMainParts::StartMetricsRecording() {
   MetricsService* metrics = g_browser_process->metrics_service();
   if (parsed_command_line_.HasSwitch(switches::kMetricsRecordingOnly) ||
       parsed_command_line_.HasSwitch(switches::kEnableBenchmarking)) {
     // If we're testing then we don't care what the user preference is, we turn
     // on recording, but not reporting, otherwise tests fail.
@@ skipping 904 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }