ash: Disable some entries in the network tray-popup instead of removing them.

ash/system/tray/tray_views.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_VIEWS_H_
 #define ASH_SYSTEM_TRAY_TRAY_VIEWS_H_
 #pragma once
 
 #include "ui/gfx/font.h"
 #include "ui/gfx/size.h"
@@ skipping 78 matching lines @@
   void set_default_color(SkColor color) { default_color_ = color; }
 
  private:
   // Overridden from ActionableView.
   virtual bool PerformAction(const views::Event& event) OVERRIDE;
 
   // Overridden from views::View.
   virtual void OnMouseEntered(const views::MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const views::MouseEvent& event) OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
+  virtual void OnEnabledChanged() OVERRIDE;
   virtual void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
 
   ViewClickListener* listener_;
   string16 accessible_name_;
   SkColor highlight_color_;
   SkColor default_color_;
   bool hover_;
 
   DISALLOW_COPY_AND_ASSIGN(HoverHighlightView);
 };
@@ skipping 26 matching lines @@
 views::View* CreateDetailedHeaderEntry(int string_id,
                                        ViewClickListener* listener);
 
 // Sets up a Label properly for the tray (sets color, font etc.).
 void SetupLabelForTray(views::Label* label);
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_VIEWS_H_