Introducing ResumeLibrary to track system resume signal

chrome/browser/chromeos/status/clock_menu_button.h

 // Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_STATUS_CLOCK_MENU_BUTTON_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_CLOCK_MENU_BUTTON_H_
 #pragma once
 
 #include "base/scoped_ptr.h"
 #include "base/timer.h"
+#include "chrome/browser/chromeos/cros/power_library.h"
 #include "chrome/browser/chromeos/cros/system_library.h"
 #include "chrome/browser/chromeos/status/status_area_button.h"
 #include "unicode/calendar.h"
 #include "views/controls/button/menu_button.h"
 #include "views/controls/menu/menu_2.h"
 #include "views/controls/menu/view_menu_delegate.h"
 
 namespace chromeos {
 
 class StatusAreaHost;
 
 // The clock menu button in the status area.
 // This button shows the current time.
 class ClockMenuButton : public StatusAreaButton,
                         public views::ViewMenuDelegate,
                         public ui::MenuModel,
+                        public PowerLibrary::Observer,
                         public SystemLibrary::Observer {
  public:
   explicit ClockMenuButton(StatusAreaHost* host);
   virtual ~ClockMenuButton();
 
   // ui::MenuModel implementation.
   virtual bool HasIcons() const  { return false; }
   virtual int GetItemCount() const;
   virtual ui::MenuModel::ItemType GetTypeAt(int index) const;
   virtual int GetCommandIdAt(int index) const { return index; }
   virtual string16 GetLabelAt(int index) const;
   virtual bool IsItemDynamicAt(int index) const { return true; }
   virtual bool GetAcceleratorAt(int index,
       ui::Accelerator* accelerator) const { return false; }
   virtual bool IsItemCheckedAt(int index) const { return false; }
   virtual int GetGroupIdAt(int index) const { return 0; }
   virtual bool GetIconAt(int index, SkBitmap* icon) const { return false; }
   virtual ui::ButtonMenuItemModel* GetButtonMenuItemAt(int index) const {
     return NULL;
   }
   virtual bool IsEnabledAt(int index) const;
   virtual ui::MenuModel* GetSubmenuModelAt(int index) const { return NULL; }
   virtual void HighlightChangedTo(int index) {}
   virtual void ActivatedAt(int index);
   virtual void MenuWillShow() {}
 
+  // Overridden from ResumeLibrary::Observer:
+  virtual void PowerChanged(PowerLibrary* obj) {}
+  virtual void SystemResumed();
+
   // Overridden from SystemLibrary::Observer:
   virtual void TimezoneChanged(const icu::TimeZone& timezone);
 
   // Updates the time on the menu button. Can be called by host if timezone
   // changes.
   void UpdateText();
 
  protected:
   virtual int horizontal_padding() { return 3; }
 
@@ skipping 12 matching lines @@
   scoped_ptr<views::Menu2> clock_menu_;
 
   StatusAreaHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(ClockMenuButton);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_CLOCK_MENU_BUTTON_H_