[Remote scheduler] Adapt the M59 defaults to M57 Stable results

components/ntp_snippets/remote/remote_suggestions_scheduler_impl.cc

 // Copyright 2016 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 "components/ntp_snippets/remote/remote_suggestions_scheduler_impl.h"
 
 #include <random>
 #include <string>
 #include <utility>
 
@@ skipping 39 matching lines @@
   SOFT_WIFI,
   COUNT
 };
 
 // The following arrays specify default values for remote suggestions fetch
 // intervals corresponding to individual user classes. The user classes are
 // defined by the user classifier. There must be an array for each user class.
 // The values of each array specify a default time interval for the intervals
 // defined by the enum FetchingInterval. The default time intervals defined in
 // the arrays can be overridden using different variation parameters.
-const double kDefaultFetchingIntervalHoursRareNtpUser[] = {48.0, 24.0, 12.0,
-                                                           6.0};
-const double kDefaultFetchingIntervalHoursActiveNtpUser[] = {24.0, 6.0, 4.0,
-                                                             2.0};
+const double kDefaultFetchingIntervalHoursRareNtpUser[] = {48.0, 24.0, 8.0,
+                                                           4.0};
+const double kDefaultFetchingIntervalHoursActiveNtpUser[] = {24.0, 8.0, 6.0,
+                                                             3.0};
 const double kDefaultFetchingIntervalHoursActiveSuggestionsConsumer[] = {
     24.0, 6.0, 2.0, 1.0};
 
 // Variation parameters than can be used to override the default fetching
 // intervals.
 const char* kFetchingIntervalParamNameRareNtpUser[] = {
     "fetching_interval_hours-fallback-rare_ntp_user",
     "fetching_interval_hours-wifi-rare_ntp_user",
     "soft_fetching_interval_hours-fallback-rare_ntp_user",
     "soft_fetching_interval_hours-wifi-rare_ntp_user"};
@@ skipping 496 matching lines @@
 
     // Add the enabled type represented by |token| into the result set.
     enabled_types.insert(
         static_cast<TriggerType>(it - std::begin(kTriggerTypeNames)));
   }
   return enabled_types;
 }
 
 std::set<RemoteSuggestionsSchedulerImpl::TriggerType>
 RemoteSuggestionsSchedulerImpl::GetDefaultEnabledTriggerTypes() {
-  return {TriggerType::PERSISTENT_SCHEDULER_WAKE_UP, TriggerType::NTP_OPENED,
-          TriggerType::BROWSER_FOREGROUNDED};
+  return {TriggerType::PERSISTENT_SCHEDULER_WAKE_UP, TriggerType::NTP_OPENED};
 }
 
 }  // namespace ntp_snippets