Move crypto_helpers from sync to base

chrome/chrome.gyp

 # Copyright (c) 2011 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': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': 'tools/build/version.py',
       'version_path': 'VERSION',
@@ skipping 578 matching lines @@
         'browser/sync/syncable/syncable-inl.h',
         'browser/sync/syncable/syncable.cc',
         'browser/sync/syncable/syncable.h',
         'browser/sync/syncable/syncable_changes_version.h',
         'browser/sync/syncable/syncable_columns.h',
         'browser/sync/syncable/syncable_id.cc',
         'browser/sync/syncable/syncable_id.h',
         'browser/sync/syncable/syncable_enum_conversions.cc',
         'browser/sync/syncable/syncable_enum_conversions.h',
         'browser/sync/util/channel.h',
-        'browser/sync/util/crypto_helpers.cc',
-        'browser/sync/util/crypto_helpers.h',
         'browser/sync/util/cryptographer.cc',
         'browser/sync/util/cryptographer.h',
         'browser/sync/util/dbgq.h',
         'browser/sync/util/extensions_activity_monitor.cc',
         'browser/sync/util/extensions_activity_monitor.h',
         'browser/sync/util/nigori.cc',
         'browser/sync/util/nigori.h',
         'browser/sync/util/user_settings.cc',
         'browser/sync/util/user_settings.h',
         'browser/sync/util/user_settings_posix.cc',
@@ skipping 949 matching lines @@
       }],  # targets
     }],  # OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"
   ],  # 'conditions'
 }
 
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 # tab-width:2
 # indent-tabs-mode:nil
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