Added Ash.SystemMenu.DefaultView.VisibleItems histogram.

ash/common/system/tray/tray_popup_item_container.cc

 // 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.
 
 #include "ash/common/system/tray/tray_popup_item_container.h"
 
 #include "ash/common/system/tray/tray_constants.h"
 #include "ui/base/ui_base_switches_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/border.h"
 #include "ui/views/layout/box_layout.h"
 
 namespace ash {
 
 TrayPopupItemContainer::TrayPopupItemContainer(views::View* view,
-                                               bool change_background,
-                                               bool draw_border)
+                                               bool change_background)
     : active_(false), change_background_(change_background) {
   set_notify_enter_exit_on_child(true);
-  if (draw_border) {
-    SetBorder(
-        views::Border::CreateSolidSidedBorder(0, 0, 1, 0, kBorderLightColor));
-  }
   views::BoxLayout* layout =
       new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0);
   layout->SetDefaultFlex(1);
   SetLayoutManager(layout);
   if (view->layer()) {
     SetPaintToLayer(true);
     layer()->SetFillsBoundsOpaquely(view->layer()->fills_bounds_opaquely());
   }
   AddChildView(view);
   SetVisible(view->visible());
 }
 
 TrayPopupItemContainer::~TrayPopupItemContainer() {}
 
+void TrayPopupItemContainer::SetDrawBorder(bool draw_border) {
+  SetBorder(draw_border ? views::Border::CreateSolidSidedBorder(
+                              0, 0, 1, 0, kBorderLightColor)
+                        : nullptr);
+}
+
 void TrayPopupItemContainer::SetActive(bool active) {
   if (!change_background_ || active_ == active)
     return;
   active_ = active;
   SchedulePaint();
 }
 
 void TrayPopupItemContainer::ChildVisibilityChanged(View* child) {
   if (visible() == child->visible())
     return;
@@ skipping 29 matching lines @@
     return;
 
   views::View* view = child_at(0);
   if (!view->background()) {
     canvas->FillRect(gfx::Rect(size()),
                      (active_) ? kHoverBackgroundColor : kBackgroundColor);
   }
 }
 
 }  // namespace ash