chromeos: Add a subdirectory "file_manager" to chrome/browser/chromeos/extensions

chrome/chrome_tests.gypi

 # Copyright 2013 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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1152 matching lines @@
         'browser/chromeos/cros/cros_mock.h',
         'browser/chromeos/drive/drive_system_service_browsertest.cc',
         'browser/chromeos/drive/drive_test_util.cc',
         'browser/chromeos/drive/drive_test_util.h',
         'browser/chromeos/extensions/echo_private_apitest.cc',
         'browser/chromeos/extensions/external_filesystem_apitest.cc',
         'browser/chromeos/extensions/file_browser_event_router_browsertest.cc',
         'browser/chromeos/extensions/file_browser_handler_api_test.cc',
         'browser/chromeos/extensions/file_browser_notifications_browsertest.cc',
         'browser/chromeos/extensions/file_browser_private_apitest.cc',
-        'browser/chromeos/extensions/file_manager_browsertest.cc',
+        'browser/chromeos/extensions/file_manager/file_manager_browsertest.cc',
         'browser/chromeos/extensions/info_private_apitest.cc',
         'browser/chromeos/extensions/input_method_apitest_chromeos.cc',
         'browser/chromeos/extensions/networking_private_apitest.cc',
         'browser/chromeos/extensions/wallpaper_private_apitest.cc',
         'browser/chromeos/kiosk_mode/mock_kiosk_mode_settings.cc',
         'browser/chromeos/kiosk_mode/mock_kiosk_mode_settings.h',
         'browser/chromeos/login/enrollment/enterprise_enrollment_screen_browsertest.cc',
         'browser/chromeos/login/enrollment/mock_enterprise_enrollment_screen.cc',
         'browser/chromeos/login/enrollment/mock_enterprise_enrollment_screen.h',
         'browser/chromeos/login/existing_user_controller_browsertest.cc',
@@ skipping 2106 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/browser_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }