Refactor AddScrollListItem() in system menu detailed views

ash/system/network/network_list.cc

 // Copyright 2016 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/system/network/network_list.h"
 
 #include <stddef.h>
 
 #include "ash/strings/grit/ash_strings.h"
 #include "ash/system/network/network_icon.h"
@@ skipping 113 matching lines @@
     // disabling of mobile radio. The toggle will get re-enabled in the next
     // call to NetworkListView::Update().
     toggle_->SetEnabled(false);
     OnToggleToggled(toggle_->is_on());
   }
 
  private:
   void InitializeLayout() {
     TrayPopupUtils::ConfigureAsStickyHeader(this);
     SetLayoutManager(new views::FillLayout);
-    container_ = TrayPopupUtils::CreateSubHeaderRowView();
+    container_ = TrayPopupUtils::CreateSubHeaderRowView(true);
     AddChildView(container_);
 
     views::Label* label = TrayPopupUtils::CreateDefaultLabel();
     style()->SetupLabel(label);
     label->SetText(l10n_util::GetStringUTF16(title_id_));
     container_->AddView(TriView::Container::CENTER, label);
   }
 
   void AddToggleButton(bool enabled) {
     toggle_ = TrayPopupUtils::CreateToggleButton(this, title_id_);
@@ skipping 526 matching lines @@
   if (found == last_network_info_map_.end()) {
     // If we cannot find |info| in |last_network_info_map_|, just return true
     // since this is a new network so we have nothing to compare.
     return true;
   } else {
     return *found->second != info;
   }
 }
 
 }  // namespace ash