Revise system profile prefs clearing

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 3824762e217d71c3d5d49fd925ab43207a558366..5069e7bcd77d99e87df4f10b6eedb88db7e25591 100644
--- a/components/metrics/metrics_log.cc
+++ b/components/metrics/metrics_log.cc
@@ -420,6 +420,8 @@ void MetricsLog::RecordEnvironment(
   std::string serialized_system_profile;
   std::string base64_system_profile;
   if (system_profile->SerializeToString(&serialized_system_profile)) {
+    // Persist the system profile to disk. In the event of an unclean shutdown,
+    // it will be used as part of the initial stability report.
     base::Base64Encode(serialized_system_profile, &base64_system_profile);
     PrefService* local_state = local_state_;
     local_state->SetString(prefs::kStabilitySavedSystemProfile,
@@ -438,11 +440,8 @@ bool MetricsLog::LoadSavedEnvironmentFromPrefs(std::string* app_version) {
       local_state->GetString(prefs::kStabilitySavedSystemProfile);
   if (base64_system_profile.empty())
     return false;
-
   const std::string system_profile_hash =
       local_state->GetString(prefs::kStabilitySavedSystemProfileHash);
-  local_state->ClearPref(prefs::kStabilitySavedSystemProfile);
-  local_state->ClearPref(prefs::kStabilitySavedSystemProfileHash);
 
   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
   std::string serialized_system_profile;