Implement CSVReader and CSVWriter to be used for password import and export.

components/password_manager.gypi

 # Copyright 2014 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': [
     {
       # GN version: //components/password_manager/core/browser
       'target_name': 'password_manager_core_browser',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../net/net.gyp:net',
         '../sql/sql.gyp:sql',
         '../url/url.gyp:url_lib',
         'autofill_core_common',
         'keyed_service_core',
         'os_crypt',
+        '../third_party/re2/re2.gyp:re2',
         'password_manager_core_common',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'password_manager/core/browser/browser_save_password_progress_logger.cc',
         'password_manager/core/browser/browser_save_password_progress_logger.h',
+        'password_manager/core/browser/export/csv_writer.cc',
+        'password_manager/core/browser/export/csv_writer.h',
+        'password_manager/core/browser/import/csv_reader.cc',
+        'password_manager/core/browser/import/csv_reader.h',
         'password_manager/core/browser/log_receiver.h',
         'password_manager/core/browser/log_router.cc',
         'password_manager/core/browser/log_router.h',
         'password_manager/core/browser/login_database.cc',
         'password_manager/core/browser/login_database.h',
         'password_manager/core/browser/login_database_mac.cc',
         'password_manager/core/browser/login_database_posix.cc',
         'password_manager/core/browser/login_database_win.cc',
         'password_manager/core/browser/login_model.h',
         'password_manager/core/browser/password_autofill_manager.cc',
@@ skipping 142 matching lines @@
             'password_manager/content/browser/content_password_manager_driver.cc',
             'password_manager/content/browser/content_password_manager_driver.h',
             'password_manager/content/browser/password_manager_internals_service_factory.cc',
             'password_manager/content/browser/password_manager_internals_service_factory.h',
           ],
         },
       ],
     }],
   ],
 }