Merge 255865 "Changing the UsersPerSession UMA metric to count r..."

chrome/browser/chromeos/login/user_manager_impl.cc

Index: chrome/browser/chromeos/login/user_manager_impl.cc
===================================================================
--- chrome/browser/chromeos/login/user_manager_impl.cc	(revision 258628)
+++ chrome/browser/chromeos/login/user_manager_impl.cc	(working copy)
@@ -7,6 +7,7 @@
 #include <cstddef>
 #include <set>
 
+#include "ash/multi_profile_uma.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ -2042,6 +2043,13 @@
 }
 
 void UserManagerImpl::UpdateNumberOfUsers() {
+  size_t users = GetLoggedInUsers().size();
+  if (users) {
+    // Write the user number as UMA stat when a multi user session is possible.
+    if ((users + GetUsersAdmittedForMultiProfile().size()) > 1)
+      ash::MultiProfileUMA::RecordUserCount(users);
+  }
+
   base::debug::SetCrashKeyValue(crash_keys::kNumberOfUsers,
       base::StringPrintf("%" PRIuS, GetLoggedInUsers().size()));
 }