Keep all references to kInstallDate inside components/metrics/

components/metrics/metrics_service.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.
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
 // A MetricsService instance is typically created at application startup.  It is
@@ skipping 161 matching lines @@
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/time/time.h"
 #include "base/tracked_objects.h"
 #include "base/values.h"
 #include "components/metrics/metrics_log.h"
 #include "components/metrics/metrics_log_manager.h"
 #include "components/metrics/metrics_log_uploader.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/metrics/metrics_reporting_scheduler.h"
 #include "components/metrics/metrics_service_client.h"
 #include "components/metrics/metrics_state_manager.h"
 #include "components/variations/entropy_provider.h"
@@ skipping 132 matching lines @@
       has_initial_stability_log_(false),
       log_upload_in_progress_(false),
       idle_since_last_transmission_(false),
       session_id_(-1),
       self_ptr_factory_(this),
       state_saver_factory_(this) {
   DCHECK(IsSingleThreaded());
   DCHECK(state_manager_);
   DCHECK(client_);
   DCHECK(local_state_);
+
+  // Set the install date if this is our first run.
+  int64 install_date = local_state_->GetInt64(metrics::prefs::kInstallDate);
+  if (install_date == 0) {
+    local_state_->SetInt64(metrics::prefs::kInstallDate,
+                           base::Time::Now().ToTimeT());
+  }
 }
 
 MetricsService::~MetricsService() {
   DisableRecording();
 }
 
 void MetricsService::InitializeMetricsRecordingState() {
   InitializeMetricsState();
 
   base::Closure callback = base::Bind(&MetricsService::StartScheduledUpload,
@@ skipping 861 matching lines @@
   RecordCurrentState(local_state_);
 }
 
 void MetricsService::RecordCurrentState(PrefService* pref) {
   pref->SetInt64(metrics::prefs::kStabilityLastTimestampSec,
                  Time::Now().ToTimeT());
 
   for (size_t i = 0; i < metrics_providers_.size(); ++i)
     metrics_providers_[i]->RecordCurrentState();
 }