Added Ash.SystemMenu.DefaultView.VisibleItems histogram.

ash/common/system/tray/tray_image_item.h

 // 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.
 
 #ifndef ASH_COMMON_SYSTEM_TRAY_TRAY_IMAGE_ITEM_H_
 #define ASH_COMMON_SYSTEM_TRAY_TRAY_IMAGE_ITEM_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/system/tray/system_tray_item.h"
 #include "base/macros.h"
 
 namespace views {
 class ImageView;
 }
 
 namespace ash {
 class TrayItemView;
 
 class ASH_EXPORT TrayImageItem : public SystemTrayItem {
  public:
-  TrayImageItem(SystemTray* system_tray, int resource_id);
+  TrayImageItem(SystemTray* system_tray, int resource_id, UmaType uma_type);
   ~TrayImageItem() override;
 
   views::View* tray_view();
 
  protected:
   virtual bool GetInitialVisibility() = 0;
 
   // Overridden from SystemTrayItem.
   views::View* CreateTrayView(LoginStatus status) override;
   views::View* CreateDefaultView(LoginStatus status) override;
@@ skipping 13 matching lines @@
 
   int resource_id_;
   TrayItemView* tray_view_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayImageItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_IMAGE_ITEM_H_