Added Ash.SystemMenu.DefaultView.VisibleItems histogram.

ash/common/system/date/tray_date.cc

 // Copyright (c) 2012 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/date/tray_date.h"
 
 #include "ash/common/shelf/wm_shelf_util.h"
 #include "ash/common/system/date/date_default_view.h"
 #include "ash/common/system/date/date_view.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/system/tray/tray_item_view.h"
 #include "ash/common/wm_shell.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/common/system/chromeos/system_clock_observer.h"
 #endif
 
 namespace ash {
 
 TrayDate::TrayDate(SystemTray* system_tray)
-    : SystemTrayItem(system_tray),
+    : SystemTrayItem(system_tray, DATE_POWER_LOCK),

[tdanderson, 2016/07/19 21:58:39]

Just DATE?

[bruthig, 2016/07/20 18:15:52]

Done.

       time_tray_(NULL),
       default_view_(NULL),
       login_status_(LoginStatus::NOT_LOGGED_IN) {
 #if defined(OS_CHROMEOS)
   system_clock_observer_.reset(new SystemClockObserver());
 #endif
   WmShell::Get()->system_tray_notifier()->AddClockObserver(this);
 }
 
 TrayDate::~TrayDate() {
@@ skipping 88 matching lines @@
         can_set_time ? TrayDate::SET_SYSTEM_TIME : TrayDate::NONE);
   }
 }
 
 void TrayDate::Refresh() {
   if (time_tray_)
     time_tray_->UpdateText();
 }
 
 }  // namespace ash