Move kInstallDate from chrome/common/pref_names.h to components/metrics/metrics_pref_names.h

components/metrics/metrics_log.cc

Index: components/metrics/metrics_log.cc
diff --git a/components/metrics/metrics_log.cc b/components/metrics/metrics_log.cc
index c5f63be3666f35a59d4d81b67cbd82d6074c9bce..6076f88a82966bc3b1d21bb3c3a728af4e4954d0 100644
--- a/components/metrics/metrics_log.cc
+++ b/components/metrics/metrics_log.cc
@@ -330,7 +330,8 @@ void MetricsLog::WriteRealtimeStabilityAttributes(
 
 void MetricsLog::RecordEnvironment(
     const std::vector<metrics::MetricsProvider*>& metrics_providers,
-    const std::vector<variations::ActiveGroupId>& synthetic_trials) {
+    const std::vector<variations::ActiveGroupId>& synthetic_trials,
+    int64 install_date) {
   DCHECK(!HasEnvironment());
 
   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
@@ -347,8 +348,6 @@ void MetricsLog::RecordEnvironment(
   // Reduce granularity of the enabled_date field to nearest hour.
   system_profile->set_uma_enabled_date(RoundSecondsToHour(enabled_date));
 
-  int64 install_date = client_->GetInstallDate();
-
   // Reduce granularity of the install_date field to nearest hour.
   system_profile->set_install_date(RoundSecondsToHour(install_date));