Added unpacking step

chrome/installer/mac/app/MainDelegate.m

-// Copyright 2016 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.
-
-#import "MainDelegate.h"
-
-@implementation MainDelegate
-
-- (void)runApplication {
-  OmahaCommunication* omahaMessenger = [[OmahaCommunication alloc] init];
-  omahaMessenger.delegate = self;
-
-  [omahaMessenger fetchDownloadURLs];
-}
-
-- (void)onOmahaSuccessWithURLs:(NSArray*)URLs {
-  Downloader* download = [[Downloader alloc] init];
-  download.delegate = self;
-
-  [download downloadChromeImageToDownloadsDirectory:[URLs firstObject]];
-}
-
-- (void)onOmahaFailureWithError:(NSError*)error {
-  NSLog(@"error: %@", [error localizedDescription]);
-  exit(1);
-}
-
-- (void)onDownloadSuccess {
-  NSLog(@"end of program, exiting.");
-  NSLog(@"in the ideal world, we would be unpacking now");
-  exit(0);
-}
-
-- (void)onDownloadFailureWithError:(NSError*)error {
-  NSLog(@"error: %@", [error localizedDescription]);
-  exit(1);
-}
-
-@end