Added Ash.SystemMenu.DefaultView.VisibleItems histogram.

ash/common/system/chromeos/supervised/tray_supervised_user.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 "ash/common/system/chromeos/supervised/tray_supervised_user.h"
 
 #include <utility>
 
 #include "ash/common/login_status.h"
 #include "ash/common/system/system_notifier.h"
@@ skipping 10 matching lines @@
 #include "ui/message_center/notification_delegate.h"
 
 using message_center::Notification;
 
 namespace ash {
 
 const char TraySupervisedUser::kNotificationId[] =
     "chrome://user/locally-managed";
 
 TraySupervisedUser::TraySupervisedUser(SystemTray* system_tray)
-    : SystemTrayItem(system_tray),
+    : SystemTrayItem(system_tray, UMA_SUPERVISED_USER),
       tray_view_(NULL),
       status_(LoginStatus::NOT_LOGGED_IN),
       is_user_supervised_(false) {
   WmShell::Get()->system_tray_delegate()->AddCustodianInfoTrayObserver(this);
 }
 
 TraySupervisedUser::~TraySupervisedUser() {
   // We need the check as on shell destruction delegate is destroyed first.
   SystemTrayDelegate* system_tray_delegate =
       WmShell::Get()->system_tray_delegate();
@@ skipping 82 matching lines @@
 
   // Not intended to be used for non-supervised users.
   CHECK(delegate->IsUserSupervised());
 
   if (delegate->IsUserChild())
     return IDR_AURA_UBER_TRAY_CHILD_USER;
   return IDR_AURA_UBER_TRAY_SUPERVISED_USER;
 }
 
 }  // namespace ash