Move files from zip_archiver/unpacker/ to zip_archiver/.

ui/file_manager/zip_archiver/js/background.js

 // Copyright 2014 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 // Event called on opening a file with the extension or mime type
 // declared in the manifest file.
 chrome.app.runtime.onLaunched.addListener(unpacker.app.onLaunched);
 
 // Save the state before suspending the event page, so we can resume it
 // once new events arrive.
 chrome.runtime.onSuspend.addListener(unpacker.app.onSuspend);
 
 chrome.fileSystemProvider.onUnmountRequested.addListener(
     unpacker.app.onUnmountRequested);
 chrome.fileSystemProvider.onGetMetadataRequested.addListener(
     unpacker.app.onGetMetadataRequested);
 chrome.fileSystemProvider.onReadDirectoryRequested.addListener(
     unpacker.app.onReadDirectoryRequested);
 chrome.fileSystemProvider.onOpenFileRequested.addListener(
     unpacker.app.onOpenFileRequested);
 chrome.fileSystemProvider.onCloseFileRequested.addListener(
     unpacker.app.onCloseFileRequested);
 chrome.fileSystemProvider.onReadFileRequested.addListener(
     unpacker.app.onReadFileRequested);
 
 // Load the PNaCl module.
 unpacker.app.loadNaclModule('module.nmf', 'application/x-pnacl');