Changing the UsersPerSession UMA metric to only count possible multi profile sessions and do this u…

ash/multi_profile_uma.cc

 // Copyright 2013 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 "ash/multi_profile_uma.h"
 
 #include "base/metrics/histogram.h"
 
 namespace ash {
 
@@ skipping 27 matching lines @@
 
 // static
 void MultiProfileUMA::RecordTeleportAction(TeleportWindowAction action) {
   UMA_HISTOGRAM_ENUMERATION("MultiProfile.TeleportWindow",
                             action,
                             NUM_TELEPORT_WINDOW_ACTIONS);
 }
 
 // static
 void MultiProfileUMA::RecordUserCount(int number_of_users) {
-  UMA_HISTOGRAM_COUNTS_100("MultiProfile.UsersPerSession", number_of_users);
+  UMA_HISTOGRAM_COUNTS_100("MultiProfile.UsersPerSessionIncremental",
+                           number_of_users);
 }
 
 // static
 void MultiProfileUMA::RecordDiscardedTab(int number_of_users) {
   UMA_HISTOGRAM_COUNTS_100("MultiProfile.DiscardedTabsPerUser",
       number_of_users);
 }
 
 }  // namespace ash