Unload Easy Unlock app when ChromeOS suspends and reload on wake up.

chrome/browser/signin/easy_unlock_service.h

 // Copyright 2014 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_SIGNIN_EASY_UNLOCK_SERVICE_H_
 #define CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 66 matching lines @@
     return turn_off_flow_status_;
   }
 
  private:
   // A class to detect whether a bluetooth adapter is present.
   class BluetoothDetector;
 
   // Initializes the service after ExtensionService is ready.
   void Initialize();
 
-  // Loads the Easy unlock component app.
+  // Installs the Easy unlock component app if it isn't installed or enables
+  // the app if it is installed but disabled.
   void LoadApp();
 
-  // Unloads the Easy unlock component app.
-  void UnloadApp();
+  // Disables the Easy unlock component app.
+  void DisableApp();
 
   // Checks whether Easy unlock should be running and updates app state.
   void UpdateAppState();
 
   // Callback when the controlling pref changes.
   void OnPrefsChanged();
 
   // Callback when Bluetooth adapter present state changes.
   void OnBluetoothAdapterPresentChanged();
 
   // Sets the new turn-off flow status.
   void SetTurnOffFlowStatus(TurnOffFlowStatus status);
 
   // Callback invoked when turn off flow has finished.
   void OnTurnOffFlowFinished(bool success);
 
   Profile* profile_;
   PrefChangeRegistrar registrar_;
   scoped_ptr<BluetoothDetector> bluetooth_detector_;
   // Created lazily in |GetScreenlockStateHandler|.
   scoped_ptr<EasyUnlockScreenlockStateHandler> screenlock_state_handler_;
 
   TurnOffFlowStatus turn_off_flow_status_;
   scoped_ptr<EasyUnlockToggleFlow> turn_off_flow_;
   ObserverList<EasyUnlockServiceObserver> observers_;
 
+#if defined(OS_CHROMEOS)
+  // Monitors suspend and wake state of ChromeOS.
+  class PowerMonitor;
+  scoped_ptr<PowerMonitor> power_monitor_;
+#endif
+
   base::WeakPtrFactory<EasyUnlockService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_