Merge "Hold wake lock while shutting down."

import android.content.DialogInterface;

import android.content.Intent;

import android.os.Handler;

import android.os.PowerManager;

import android.os.RemoteException;

import android.os.Power;

import android.os.ServiceManager;

    private final Object mBroadcastDoneSync = new Object();

    private boolean mBroadcastDone;

    private Context mContext;

    private PowerManager mPowerManager;

    private PowerManager.WakeLock mWakeLock;

    private Handler mHandler;

    private ShutdownThread() {

        // start the thread that initiates shutdown

        sInstance.mContext = context;

        sInstance.mPowerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);

        sInstance.mWakeLock = null;

        if (sInstance.mPowerManager.isScreenOn()) {

            try {

                sInstance.mWakeLock = sInstance.mPowerManager.newWakeLock(

                        PowerManager.FULL_WAKE_LOCK, "Shutdown");

                sInstance.mWakeLock.acquire();

            } catch (SecurityException e) {

                Log.w(TAG, "No permission to acquire wake lock", e);

                sInstance.mWakeLock = null;

            }

        }

        sInstance.mHandler = new Handler() {

        };

        sInstance.start();