[Sync] Move //sync to //components/sync.

sync/protocol/wifi_credential_specifics.proto

-// 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.
-//
-// Sync protocol datatype extension for WiFi credentials.
-
-// Update proto_{value,enum}_conversions{.h,.cc,_unittest.cc} if you change
-// any fields in this file.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-option retain_unknown_fields = true;
-
-package sync_pb;
-
-// Properties of WiFi credential objects.
-message WifiCredentialSpecifics {
-  optional bytes ssid = 1;  // Not necessarily UTF-8. May contain NUL.
-
-  enum SecurityClass {
-    SECURITY_CLASS_INVALID = 0;
-    SECURITY_CLASS_NONE = 1;
-    SECURITY_CLASS_WEP = 2;
-    SECURITY_CLASS_PSK = 3;  // WPA-PSK or RSN-PSK
-    // 802.1X is omittted, as we do not support syncing 802.1X
-    // credentials.
-  }
-  optional SecurityClass security_class = 2;
-
-  // Network passphrase.
-  //
-  // For SECURITY_CLASS_NONE, the passphrase should be ignored.
-  //
-  // For SECURITY_CLASS_WEP, the passphrase should have one of the
-  // following formats:
-  // - WEP-40:
-  //   - 5 character ASCII string. Each character maps one byte of the key.
-  //   - 10 character hex string. The string maps to the WEP key by simple
-  //     hex decoding.
-  // - WEP-104:
-  //   - 13 character ASCII string. Each character maps one byte of the key.
-  //   - 26 character hex string. The string maps to the WEP key by simple
-  //     hex decoding.
-  //
-  // For SECURITY_CLASS_PSK, the passphrase should have one of the
-  // following two formats:
-  // - An 8-63 character ASCII string. The string maps to the
-  //   WPA/WPA-2 PSK as per IEEE 802.11i.
-  // - A 64 character hex string. The string maps to the PSK per
-  //   simple hex decoding.
-  //
-  // Note that, although the passphrase "should" contain only ASCII
-  // characters, we represent |passphrase| as |bytes| rather than
-  // |string|. This is to accomodate networks that use non-ASCII
-  // passphrases.
-  optional bytes passphrase = 3;
-}