[Sync] Create new top-level sync/ directory

chrome/browser/sync/protocol/sync_enums.proto

-// 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.
-//
-// Sync protocol for communication between sync client and server.
-
-// Update proto_value_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;
-
-message SyncEnums {
-  // These events are sent by |SyncManager| class. Note: In the code they each
-  // of these events have some additional info but we are not sending them to
-  // server.
-  enum EventType {
-    AUTH_ERROR = 1; // Auth error. Note this gets generated even during
-                    // successful auth with the error set to none.
-    UPDATED_TOKEN = 2; // Client received an updated token.
-    PASSPHRASE_REQUIRED = 3; // Cryptographer needs passphrase.
-    PASSPHRASE_ACCEPTED = 4; // Passphrase was accepted by cryptographer.
-    INITIALIZATION_COMPLETE = 5; // Sync Initialization is complete.
-
-    // |STOP_SYNCING_PERMANENTLY| event should never be seen by the server in
-    // the absence of bugs.
-    STOP_SYNCING_PERMANENTLY = 6; // Server sent stop syncing permanently.
-
-    ENCRYPTED_TYPES_CHANGED = 9; // Set of encrypted types has changed.
-    ENCRYPTION_COMPLETE = 7; // Client has finished encrypting all data.
-    ACTIONABLE_ERROR = 8; // Client received an actionable error.
-  }
-
-  enum ErrorType {
-    SUCCESS            = 0;
-    ACCESS_DENIED      = 1;   // Returned when the user doesn't have access to
-                              // store (instead of HTTP 401).
-    NOT_MY_BIRTHDAY    = 2;   // Returned when the server and client disagree on
-                              // the store birthday.
-    THROTTLED          = 3;   // Returned when the store has exceeded the
-                              // allowed bandwidth utilization.
-    AUTH_EXPIRED       = 4;   // Auth token or cookie has expired.
-    USER_NOT_ACTIVATED = 5;   // User doesn't have the Chrome bit set on that
-                              // Google Account.
-    AUTH_INVALID       = 6;   // Auth token or cookie is otherwise invalid.
-    CLEAR_PENDING      = 7;   // A clear of the user data is pending (e.g.
-                              // initiated by privacy request).  Client should
-                              // come back later.
-    TRANSIENT_ERROR    = 8;   // A transient error occured (eg. backend
-                              // timeout). Client should try again later.
-    MIGRATION_DONE     = 9;   // Migration has finished for one or more data
-                              // types.  Client should clear the cache for
-                              // these data types only and then re-sync with
-                              // a server.
-    UNKNOWN            = 100; // Unknown value. This should never be explicitly
-                              // used; it is the default value when an
-                              // out-of-date client parses a value it doesn't
-                              // recognize.
-  }
-}