Added Ash.SystemMenu.DefaultView.VisibleItems histogram.

ash/common/system/tray/tray_popup_item_container.h

 // Copyright (c) 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.
 
 #ifndef ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_ITEM_CONTAINER_H_
 #define ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_ITEM_CONTAINER_H_
 
 #include "base/macros.h"
 #include "ui/views/view.h"
 
 namespace ash {
 
 // A view which can optionally change the background color when a mouse is
 // hovering or a user is interacting via touch.
 class TrayPopupItemContainer : public views::View {
  public:
-  TrayPopupItemContainer(views::View* view,
-                         bool change_background,
-                         bool draw_border);
+  TrayPopupItemContainer(views::View* view, bool change_background);
 
   ~TrayPopupItemContainer() override;
 
+  void SetDrawBorder(bool draw_border);
+
   bool active() { return active_; }
 
  private:
   // Sets whether the active background is to be used, and triggers a paint.
   void SetActive(bool active);
 
   // views::View:
   void ChildVisibilityChanged(views::View* child) override;
   void ChildPreferredSizeChanged(views::View* child) override;
   void OnMouseEntered(const ui::MouseEvent& event) override;
   void OnMouseExited(const ui::MouseEvent& event) override;
   void OnGestureEvent(ui::GestureEvent* event) override;
   void OnPaintBackground(gfx::Canvas* canvas) override;
 
   // True if either a mouse is hovering over this view, or if a user has touched
   // down.
   bool active_;
 
   // True if mouse hover and touch feedback can alter the background color of
   // the container.
   bool change_background_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayPopupItemContainer);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_ITEM_CONTAINER_H_