Add the LoggedIn Predictor, to detect which websites a user is likely

chrome/browser/prerender/prerender_field_trial.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/prerender/prerender_field_trial.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
@@ skipping 11 matching lines @@
 namespace prerender {
 
 namespace {
 
 const char kOmniboxTrialName[] = "PrerenderFromOmnibox";
 int g_omnibox_trial_default_group_number = kint32min;
 
 const char kLocalPredictorTrialName[] = "PrerenderLocalPredictor";
 const char kLocalPredictorEnabledGroup[] = "Enabled";
 
+const char kLoggedInPredictorTrialName[] = "PrerenderLoggedInPredictor";
+const char kLoggedInPredictorEnabledGroup[] = "Enabled";
+const char kLoggedInPredictorDisabledGroup[] = "Disabled";
+
 void SetupPrefetchFieldTrial() {
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   if (channel == chrome::VersionInfo::CHANNEL_STABLE ||
       channel == chrome::VersionInfo::CHANNEL_BETA) {
     return;
   }
 
   const FieldTrial::Probability divisor = 1000;
   const FieldTrial::Probability prefetch_probability = 500;
   scoped_refptr<FieldTrial> trial(
@@ skipping 92 matching lines @@
     PrerenderManager::SetMode(
         PrerenderManager::PRERENDER_MODE_EXPERIMENT_NO_USE_GROUP);
   } else {
     NOTREACHED();
   }
 }
 
 }  // end namespace
 
 void ConfigureOmniboxPrerender();
+void ConfigureLoggedInPredictor();
 
 void ConfigurePrefetchAndPrerender(const CommandLine& command_line) {
   enum PrerenderOption {
     PRERENDER_OPTION_AUTO,
     PRERENDER_OPTION_DISABLED,
     PRERENDER_OPTION_ENABLED,
     PRERENDER_OPTION_PREFETCH_ONLY,
   };
 
   PrerenderOption prerender_option = PRERENDER_OPTION_AUTO;
@@ skipping 36 matching lines @@
       break;
     case PRERENDER_OPTION_PREFETCH_ONLY:
       PrerenderManager::SetIsPrefetchEnabled(true);
       PrerenderManager::SetMode(PrerenderManager::PRERENDER_MODE_DISABLED);
       break;
     default:
       NOTREACHED();
   }
 
   ConfigureOmniboxPrerender();
+  ConfigureLoggedInPredictor();
 }
 
 void ConfigureOmniboxPrerender() {
   // Field trial to see if we're enabled.
   const FieldTrial::Probability kDivisor = 100;
 
   FieldTrial::Probability kDisabledProbability = 10;
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   if (channel == chrome::VersionInfo::CHANNEL_STABLE ||
       channel == chrome::VersionInfo::CHANNEL_BETA) {
     kDisabledProbability = 1;
   }
   scoped_refptr<FieldTrial> omnibox_prerender_trial(
       FieldTrialList::FactoryGetFieldTrial(
           kOmniboxTrialName, kDivisor, "OmniboxPrerenderEnabled",
           2013, 12, 31, &g_omnibox_trial_default_group_number));
   omnibox_prerender_trial->AppendGroup("OmniboxPrerenderDisabled",
                                        kDisabledProbability);
 }
 
+void ConfigureLoggedInPredictor() {
+  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
+  if (channel == chrome::VersionInfo::CHANNEL_STABLE ||
+      channel == chrome::VersionInfo::CHANNEL_BETA) {
+    return;
+  }
+  scoped_refptr<FieldTrial> logged_in_predictor_trial(
+      FieldTrialList::FactoryGetFieldTrial(
+          kLoggedInPredictorTrialName, 100,
+          kLoggedInPredictorDisabledGroup, 2013, 12, 31, NULL));
+  logged_in_predictor_trial->AppendGroup(kLoggedInPredictorEnabledGroup, 100);
+}
+
 bool IsOmniboxEnabled(Profile* profile) {
   if (!profile)
     return false;
 
   if (!PrerenderManager::IsPrerenderingPossible())
     return false;
 
   // Override any field trial groups if the user has set a command line flag.
   if (CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kPrerenderFromOmnibox)) {
@@ skipping 13 matching lines @@
   const int group = FieldTrialList::FindValue(kOmniboxTrialName);
   return group == FieldTrial::kNotFinalized ||
          group == g_omnibox_trial_default_group_number;
 }
 
 bool IsLocalPredictorEnabled() {
   return base::FieldTrialList::FindFullName(kLocalPredictorTrialName) ==
       kLocalPredictorEnabledGroup;
 }
 
+bool IsLoggedInPredictorEnabled() {
+  return base::FieldTrialList::FindFullName(kLoggedInPredictorTrialName) ==
+      kLoggedInPredictorEnabledGroup;
+}
+
 }  // namespace prerender