Added Ash.SystemMenu.DefaultView.VisibleItems histogram.

ash/common/system/tray/tray_image_item.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/tray/tray_image_item.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/wm_shelf_util.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/tray_constants.h"
@@ skipping 36 matching lines @@
     default:
       NOTREACHED();
       break;
   }
 
   return vector_id;
 }
 
 }  // namespace
 
-TrayImageItem::TrayImageItem(SystemTray* system_tray, int resource_id)
-    : SystemTrayItem(system_tray),
+TrayImageItem::TrayImageItem(SystemTray* system_tray,
+                             int resource_id,
+                             UmaType uma_type)
+    : SystemTrayItem(system_tray, uma_type),
       resource_id_(resource_id),
       tray_view_(nullptr) {}
 
 TrayImageItem::~TrayImageItem() {}
 
 views::View* TrayImageItem::tray_view() {
   return tray_view_;
 }
 
 views::View* TrayImageItem::CreateTrayView(LoginStatus status) {
@@ skipping 52 matching lines @@
 void TrayImageItem::SetItemAlignment(ShelfAlignment alignment) {
   // Center the item dependent on the orientation of the shelf.
   views::BoxLayout::Orientation layout = IsHorizontalAlignment(alignment)
                                              ? views::BoxLayout::kHorizontal
                                              : views::BoxLayout::kVertical;
   tray_view_->SetLayoutManager(new views::BoxLayout(layout, 0, 0, 0));
   tray_view_->Layout();
 }
 
 }  // namespace ash