Add log date to the metrics log

components/metrics/metrics_log.cc

 // Copyright 2014 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/metrics/metrics_log.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 409 matching lines @@
   std::string serialized_system_profile;
   std::string base64_system_profile;
   if (system_profile->SerializeToString(&serialized_system_profile)) {
     base::Base64Encode(serialized_system_profile, &base64_system_profile);
     PrefService* local_state = local_state_;
     local_state->SetString(prefs::kStabilitySavedSystemProfile,
                            base64_system_profile);
     local_state->SetString(prefs::kStabilitySavedSystemProfileHash,
                            ComputeSHA1(serialized_system_profile));
   }
+
+  system_profile->set_log_date(
+      (base::Time::Now() - base::Time::UnixEpoch()).InSeconds());
 }
 
 bool MetricsLog::LoadSavedEnvironmentFromPrefs(std::string* app_version) {
   DCHECK(app_version);
   app_version->clear();
 
   PrefService* local_state = local_state_;
   const std::string base64_system_profile =
       local_state->GetString(prefs::kStabilitySavedSystemProfile);
   if (base64_system_profile.empty())
@@ skipping 20 matching lines @@
   DCHECK(!closed_);
   closed_ = true;
 }
 
 void MetricsLog::GetEncodedLog(std::string* encoded_log) {
   DCHECK(closed_);
   uma_proto_.SerializeToString(encoded_log);
 }
 
 }  // namespace metrics