Create NetworkTimeTracker on startup for users in Finch experiment

components/network_time/network_time_tracker.cc

Index: components/network_time/network_time_tracker.cc
diff --git a/components/network_time/network_time_tracker.cc b/components/network_time/network_time_tracker.cc
index a9f9f82c89a7837939f59d6c977295bad32edfac..43534ec99b050b6fb84b3246e8ac9f455190034d 100644
--- a/components/network_time/network_time_tracker.cc
+++ b/components/network_time/network_time_tracker.cc
@@ -8,7 +8,6 @@
 #include <string>
 #include <utility>
 
-#include "base/feature_list.h"
 #include "base/i18n/time_formatting.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
@@ -35,6 +34,9 @@
 
 namespace network_time {
 
+const base::Feature kNetworkTimeServiceQuerying{
+    "NetworkTimeServiceQuerying", base::FEATURE_DISABLED_BY_DEFAULT};
+
 namespace {
 
 // Time updates happen in two ways. First, other components may call
@@ -95,10 +97,6 @@ const uint32_t kTimeServerMaxSkewSeconds = 10;
 
 const char kTimeServiceURL[] = "http://clients2.google.com/time/1/current";
 
-// Variations Service feature that enables network time service querying.
-const base::Feature kNetworkTimeServiceQuerying{
-    "NetworkTimeServiceQuerying", base::FEATURE_DISABLED_BY_DEFAULT};
-
 const char kVariationsServiceCheckTimeIntervalSeconds[] =
     "CheckTimeIntervalSeconds";
 const char kVariationsServiceRandomQueryProbability[] =