chromeos: Simplify power supply info in PowerLibrary

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/memory/scoped_ptr.h"
 #include "base/timer.h"
@@ skipping 28 matching lines @@
  public:
   explicit ClockMenuButton(StatusAreaHost* host);
   virtual ~ClockMenuButton();
 
   // views::MenuDelegate implementation
   virtual string16 GetLabel(int id) const OVERRIDE;
   virtual bool IsCommandEnabled(int id) const OVERRIDE;
   virtual void ExecuteCommand(int id) OVERRIDE;
 
   // Overridden from ResumeLibrary::Observer:
-  virtual void PowerChanged(PowerLibrary* obj) {}
+  virtual void PowerChanged(const PowerSupplyStatus& status) {}
   virtual void SystemResumed();
 
   // Overridden from TimezoneSettings::Observer:
   virtual void TimezoneChanged(const icu::TimeZone& timezone);
 
   // views::View
   virtual void OnLocaleChanged() OVERRIDE;
 
   // Updates the time on the menu button. Can be called by host if timezone
   // changes.
@@ skipping 30 matching lines @@
   // Default value for use_24hour_clock. Used when StatusAreaHost does not
   // have a profile, i.e. on login screen and lock screen.
   bool default_use_24hour_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(ClockMenuButton);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_CLOCK_MENU_BUTTON_H_