[ash-md] Makes Wi-Fi header row sticky when network list is scrolled

ash/common/system/tray/tray_details_view.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_DETAILS_VIEW_H_
 #define ASH_COMMON_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_
 
 #include "ash/ash_export.h"
+#include "ash/common/system/tray/header_list_scroll_view.h"
 #include "ash/common/system/tray/special_popup_row.h"
 #include "ash/common/system/tray/view_click_listener.h"
 #include "base/macros.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
 
 namespace views {
 class ScrollView;
 class ProgressBar;
 }  // namespace views
@@ skipping 16 matching lines @@
 
   // ViewClickListener:
   void OnViewClicked(views::View* sender) override;
 
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   SystemTrayItem* owner() { return owner_; }
   SpecialPopupRow* title_row() { return title_row_; }
   FixedSizedScrollView* scroller() { return scroller_; }
-  views::View* scroll_content() { return scroll_content_; }
+  HeaderListScrollView* scroll_content() { return scroll_content_; }
   views::ProgressBar* progress_bar() { return progress_bar_; }
 
  protected:
   // views::View:
   void Layout() override;
   void OnPaintBorder(gfx::Canvas* canvas) override;
 
   // Creates the row containing the back button and title. For material design
   // this appears at the top of the view, for non-material design it appears
   // at the bottom.
@@ skipping 27 matching lines @@
   virtual void CreateExtraTitleRowButtons();
 
   // Transition to default view from details view. If |title_row_| has focus
   // before transition, the default view should focus on the owner of this
   // details view.
   void TransitionToDefaultView();
 
   SystemTrayItem* owner_;
   SpecialPopupRow* title_row_;
   FixedSizedScrollView* scroller_;
-  views::View* scroll_content_;
+  HeaderListScrollView* scroll_content_;
   views::ProgressBar* progress_bar_;
 
   // |title_row_separator_| has a views::Separator as a child and, optionally,
   // |progress_bar_| as a child.
   views::View* title_row_separator_;
 
   ScrollBorder* scroll_border_;  // Weak reference
 
   // The back button that appears in the material design title row. Not owned.
   views::Button* back_button_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayDetailsView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_