[User classifier] Adapt the defaults to planned M58 rollout

components/ntp_snippets/user_classifier.cc

Index: components/ntp_snippets/user_classifier.cc
diff --git a/components/ntp_snippets/user_classifier.cc b/components/ntp_snippets/user_classifier.cc
index 92b0312de491dbd848919aeeeb62298b9d35405c..a2461be9ef9227748f4741fbf4b2bbe040d2d2dd 100644
--- a/components/ntp_snippets/user_classifier.cc
+++ b/components/ntp_snippets/user_classifier.cc
@@ -41,11 +41,13 @@ const double kMinHours = 0.5;
 const char kMinHoursParam[] = "user_classifier_min_hours";
 
 // Classification constants.
-const double kActiveConsumerClicksAtLeastOncePerHours = 72;
+const double kActiveConsumerClicksAtLeastOncePerHours = 96;
 const char kActiveConsumerClicksAtLeastOncePerHoursParam[] =
     "user_classifier_active_consumer_clicks_at_least_once_per_hours";
 
-const double kRareUserOpensNTPAtMostOncePerHours = 96;
+// The previous value in production was 72, i.e. 3 days. The new value is a
+// cautios shift in the direction we want (having slightly more rare users).
+const double kRareUserOpensNTPAtMostOncePerHours = 66;
 const char kRareUserOpensNTPAtMostOncePerHoursParam[] =
     "user_classifier_rare_user_opens_ntp_at_most_once_per_hours";
 
@@ -73,7 +75,7 @@ const char* kLastTimeKeys[] = {prefs::kUserClassifierLastTimeToOpenNTP,
                                prefs::kUserClassifierLastTimeToUseSuggestions};
 
 // Default lengths of the intervals for new users for the metrics.
-const double kInitialHoursBetweenEvents[] = {24, 48, 96};
+const double kInitialHoursBetweenEvents[] = {24, 48, 120};
 const char* kInitialHoursBetweenEventsParams[] = {
     "user_classifier_default_interval_ntp_opened",
     "user_classifier_default_interval_suggestions_shown",