[Athena] Make a quick power button tap suspend the device

chromeos/dbus/power_manager_client.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 CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_
 #define CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 110 matching lines @@
   // Decreases the keyboard brightness.
   virtual void DecreaseKeyboardBrightness() = 0;
 
   // Increases the keyboard brightness.
   virtual void IncreaseKeyboardBrightness() = 0;
 
   // Requests an updated copy of the power status. Observer::PowerChanged()
   // will be called asynchronously.
   virtual void RequestStatusUpdate() = 0;
 
+  // Requests suspend of the system.
+  virtual void RequestSuspend() = 0;
+
   // Requests restart of the system.
   virtual void RequestRestart() = 0;
 
   // Requests shutdown of the system.
   virtual void RequestShutdown() = 0;
 
   // Notifies the power manager that the user is active (i.e. generating input
   // events).
   virtual void NotifyUserActivity(power_manager::UserActivityType type) = 0;
 
@@ skipping 27 matching lines @@
   // Create() should be used instead.
   PowerManagerClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PowerManagerClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_