sync: add WIFI_CREDENTIALS protobuf, ModelType, and preference

sync/protocol/sync.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";
@@ skipping 32 matching lines @@
 import "preference_specifics.proto";
 import "priority_preference_specifics.proto";
 import "search_engine_specifics.proto";
 import "session_specifics.proto";
 import "sync_enums.proto";
 import "synced_notification_app_info_specifics.proto";
 import "synced_notification_specifics.proto";
 import "theme_specifics.proto";
 import "typed_url_specifics.proto";
 import "unique_position.proto";
+import "wifi_credential_specifics.proto";
 
 // Used for inspecting how long we spent performing operations in different
 // backends. All times must be in millis.
 message ProfilingData {
   optional int64 meta_data_write_time = 1;
   optional int64 file_data_write_time = 2;
   optional int64 user_lookup_time = 3;
   optional int64 meta_data_read_time = 4;
   optional int64 file_data_read_time = 5;
   optional int64 total_request_time = 6;
@@ skipping 61 matching lines @@
   optional DictionarySpecifics dictionary = 170540;
   optional FaviconTrackingSpecifics favicon_tracking = 181534;
   optional FaviconImageSpecifics favicon_image = 182019;
   optional ManagedUserSettingSpecifics managed_user_setting = 186662;
   optional ManagedUserSpecifics managed_user = 194582;
   optional ManagedUserSharedSettingSpecifics managed_user_shared_setting =
       202026;
   optional ArticleSpecifics article = 223759;
   optional AppListSpecifics app_list = 229170;
   optional EnhancedBookmarkSpecifics enhanced_bookmark = 294694;
+  optional WifiCredentialSpecifics wifi_credential = 218175;
 }
 
 message SyncEntity {
   // This item's identifier.  In a commit of a new item, this will be a
   // client-generated ID.  If the commit succeeds, the server will generate
   // a globally unique ID and return it to the committing client in the
   // CommitResponse.EntryResponse.  In the context of a GetUpdatesResponse,
   // |id_string| is always the server generated ID.  The original
   // client-generated ID is preserved in the |originator_client_id| field.
   // Present in both GetUpdatesResponse and CommitMessage.
@@ skipping 816 matching lines @@
     // Currently only meaningful if |error_type| is throttled. If this field
     // is absent then the whole client (all datatypes) is throttled.
     repeated int32 error_data_type_ids = 5;
   }
   optional Error error = 13;
 
   // The new per-client state for this client. If set, should be persisted and
   // sent with any subsequent ClientToServerMessages.
   optional ChipBag new_bag_of_chips = 14;
 };