cros: Add enterprise user session metrics

chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
index 782663d2df5a1aa759da106827ac800953d55e51..1811306000fc18dcfc0bc2486f81c1ba535a0ac9 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
@@ -33,6 +33,7 @@
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
 #include "chrome/browser/chromeos/login/demo_mode/demo_app_launcher.h"
+#include "chrome/browser/chromeos/login/enterprise_user_session_metrics.h"
 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
 #include "chrome/browser/chromeos/login/signin/auth_sync_observer.h"
 #include "chrome/browser/chromeos/login/signin/auth_sync_observer_factory.h"
@@ -163,6 +164,7 @@ void ChromeUserManagerImpl::RegisterPrefs(PrefRegistrySimple* registry) {
   SupervisedUserManager::RegisterPrefs(registry);
   SessionLengthLimiter::RegisterPrefs(registry);
   BootstrapManager::RegisterPrefs(registry);
+  enterprise_user_session_metrics::RegisterPrefs(registry);
 }
 
 // static
@@ -225,6 +227,10 @@ ChromeUserManagerImpl::ChromeUserManagerImpl()
           cros_settings_, device_local_account_policy_service,
           policy::key::kWallpaperImage, this);
   wallpaper_policy_observer_->Init();
+
+  // Record the stored session length for enrolled device.
+  if (IsEnterpriseManaged())
+    enterprise_user_session_metrics::RecordStoredSessionLength();
 }
 
 ChromeUserManagerImpl::~ChromeUserManagerImpl() {
@@ -236,6 +242,17 @@ void ChromeUserManagerImpl::Shutdown() {
 
   local_accounts_subscription_.reset();
 
+  if (session_length_limiter_ && IsEnterpriseManaged()) {
+    // Store session length before tearing down |session_length_limiter_| for
+    // enrolled devices so that it can be reported on the next run.
+    const base::TimeDelta session_length =
+        session_length_limiter_->GetSessionDuration();
+    if (!session_length.is_zero()) {
+      enterprise_user_session_metrics::StoreSessionLength(
+          GetActiveUser()->GetType(), session_length);
+    }
+  }
+
   // Stop the session length limiter.
   session_length_limiter_.reset();