Implement snapshotting for non-Drive non-local file systems.

chrome/chrome_browser_chromeos.gypi

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_chromeos',
       'type': 'static_library',
@@ skipping 350 matching lines @@
         'browser/chromeos/file_manager/mounted_disk_monitor.cc',
         'browser/chromeos/file_manager/mounted_disk_monitor.h',
         'browser/chromeos/file_manager/open_util.cc',
         'browser/chromeos/file_manager/open_util.h',
         'browser/chromeos/file_manager/open_with_browser.cc',
         'browser/chromeos/file_manager/open_with_browser.h',
         'browser/chromeos/file_manager/path_util.cc',
         'browser/chromeos/file_manager/path_util.h',
         'browser/chromeos/file_manager/select_file_dialog_util.cc',
         'browser/chromeos/file_manager/select_file_dialog_util.h',
+        'browser/chromeos/file_manager/snapshot_manager.cc',
+        'browser/chromeos/file_manager/snapshot_manager.h',
         'browser/chromeos/file_manager/url_util.cc',
         'browser/chromeos/file_manager/url_util.h',
         'browser/chromeos/file_manager/volume_manager.cc',
         'browser/chromeos/file_manager/volume_manager.h',
         'browser/chromeos/file_manager/volume_manager_factory.cc',
         'browser/chromeos/file_manager/volume_manager_factory.h',
         'browser/chromeos/file_manager/volume_manager_observer.h',
         'browser/chromeos/file_manager/zip_file_creator.cc',
         'browser/chromeos/file_manager/zip_file_creator.h',
         'browser/chromeos/file_system_provider/fileapi/backend_delegate.cc',
@@ skipping 780 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }