Refactor SpecialPopupRow out of tray_views.h/cc into its own files.

ash/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_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_
 #define ASH_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_
 
+#include "ash/system/tray/special_popup_row.h"

[stevenjb, 2013/02/13 23:13:16]

Can we avoid this? It looks like we just need to add it to two .cc files.

[jennyz, 2013/02/13 23:36:57]

It is more convenient to include it here, otherwise, we will need to include it
in all the tray_xx.cc files where footer() is accessed in the TrayDetailsView
derived class, which are a lot(9 files).

 #include "ui/views/view.h"
 
 namespace views {
 class ScrollView;
 }
 
 namespace ash {
 
 class SystemTrayItem;
 
 namespace internal {
 
 class FixedSizedScrollView;
 class ScrollBorder;
-class SpecialPopupRow;
 class ViewClickListener;
 
 class TrayDetailsView : public views::View {
  public:
   explicit TrayDetailsView(SystemTrayItem* owner);
   virtual ~TrayDetailsView();
 
   // Creates a row with special highlighting etc. This is typically the
   // bottom-most row in the popup.
   void CreateSpecialRow(int string_id, ViewClickListener* listener);
@@ skipping 25 matching lines @@
   views::View* scroll_content_;
   ScrollBorder* scroll_border_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayDetailsView);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_