Added Ash.SystemMenu.DefaultView.VisibleItems histogram.

ash/common/system/chromeos/power/tray_power.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/chromeos/power/tray_power.h"
 
 #include <utility>
 
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/ash_switches.h"
@@ skipping 125 matching lines @@
 const int TrayPower::kCriticalMinutes = 5;
 const int TrayPower::kLowPowerMinutes = 15;
 const int TrayPower::kNoWarningMinutes = 30;
 const int TrayPower::kCriticalPercentage = 5;
 const int TrayPower::kLowPowerPercentage = 10;
 const int TrayPower::kNoWarningPercentage = 15;
 
 const char TrayPower::kUsbNotificationId[] = "usb-charger";
 
 TrayPower::TrayPower(SystemTray* system_tray, MessageCenter* message_center)
-    : SystemTrayItem(system_tray),
+    : SystemTrayItem(system_tray, UMA_POWER),
       message_center_(message_center),
       power_tray_(NULL),
       notification_state_(NOTIFICATION_NONE),
       usb_charger_was_connected_(false),
       line_power_was_connected_(false),
       usb_notification_dismissed_(false) {
   PowerStatus::Get()->AddObserver(this);
 }
 
 TrayPower::~TrayPower() {
@@ skipping 193 matching lines @@
   }
   NOTREACHED();
   return false;
 }
 
 void TrayPower::NotifyUsbNotificationClosedByUser() {
   usb_notification_dismissed_ = true;
 }
 
 }  // namespace ash