[fsp] Extract common code to FileSystemProvidedInternalFunction.

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 979 matching lines @@
             'browser/chromeos/extensions/file_manager/private_api_mount.cc',
             'browser/chromeos/extensions/file_manager/private_api_mount.h',
             'browser/chromeos/extensions/file_manager/private_api_strings.cc',
             'browser/chromeos/extensions/file_manager/private_api_strings.h',
             'browser/chromeos/extensions/file_manager/private_api_tasks.cc',
             'browser/chromeos/extensions/file_manager/private_api_tasks.h',
             'browser/chromeos/extensions/file_manager/private_api_util.cc',
             'browser/chromeos/extensions/file_manager/private_api_util.h',
             'browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc',
             'browser/chromeos/extensions/file_system_provider/file_system_provider_api.h',
+            'browser/chromeos/extensions/file_system_provider/provider_function.cc',
+            'browser/chromeos/extensions/file_system_provider/provider_function.h',
             'browser/chromeos/extensions/first_run_private_api.cc',
             'browser/chromeos/extensions/first_run_private_api.h',
             'browser/chromeos/extensions/input_method_api.cc',
             'browser/chromeos/extensions/input_method_api.h',
             'browser/chromeos/extensions/screenlock_private_api.cc',
             'browser/chromeos/extensions/screenlock_private_api.h',
             'browser/chromeos/extensions/media_player_api.cc',
             'browser/chromeos/extensions/media_player_api.h',
             'browser/chromeos/extensions/wallpaper_manager_util.cc',
             'browser/chromeos/extensions/wallpaper_manager_util.h',
@@ skipping 115 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' ]
     },
   ],
 }