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

chrome/browser/prerender/prerender_field_trial.cc

Index: chrome/browser/prerender/prerender_field_trial.cc
===================================================================
--- chrome/browser/prerender/prerender_field_trial.cc	(revision 194439)
+++ chrome/browser/prerender/prerender_field_trial.cc	(working copy)
@@ -29,6 +29,10 @@
 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 ||
@@ -141,6 +145,7 @@
 }  // end namespace
 
 void ConfigureOmniboxPrerender();
+void ConfigureLoggedInPredictor();
 
 void ConfigurePrefetchAndPrerender(const CommandLine& command_line) {
   enum PrerenderOption {
@@ -197,6 +202,7 @@
   }
 
   ConfigureOmniboxPrerender();
+  ConfigureLoggedInPredictor();
 }
 
 void ConfigureOmniboxPrerender() {
@@ -217,6 +223,19 @@
                                        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;
@@ -250,4 +269,9 @@
       kLocalPredictorEnabledGroup;
 }
 
+bool IsLoggedInPredictorEnabled() {
+  return base::FieldTrialList::FindFullName(kLoggedInPredictorTrialName) ==
+      kLoggedInPredictorEnabledGroup;
+}
+
 }  // namespace prerender