Merge "Page shredder callback invoked on the wrong thread." into lmp-dev

import android.view.View.OnClickListener;

import android.view.View.OnFocusChangeListener;

import android.view.ViewGroup;

import android.view.accessibility.AccessibilityEvent;

import android.view.inputmethod.InputMethodManager;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

            new AsyncTask<Void, Void, Void>() {

                @Override

                protected Void doInBackground(Void... params) {

                    try {

                    // It's OK to access the data members as they are

                    // final and this code is the last one to touch

                    // them as shredding is the very last step, so the

                    // UI is not interactive at this point.

                    shredPages(editor);

                    updatePrintJob();

                    } finally {

                    return null;

                }

                @Override

                protected void onPostExecute(Void aVoid) {

                    mContext.unbindService(PageShredder.this);

                    mCallback.run();

                }

                    return null;

                }

            }.executeOnExecutor(AsyncTask.SERIAL_EXECUTOR);

        }