Add an action for server to send down rollback command.

sync/engine/syncer_proto_util.cc

 // 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.
 
 #include "sync/engine/syncer_proto_util.h"
 
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
 #include "google_apis/google_api_keys.h"
 #include "sync/engine/net/server_connection_manager.h"
@@ skipping 129 matching lines @@
     case sync_pb::SyncEnums::UPGRADE_CLIENT:
       return UPGRADE_CLIENT;
     case sync_pb::SyncEnums::CLEAR_USER_DATA_AND_RESYNC:
       return CLEAR_USER_DATA_AND_RESYNC;
     case sync_pb::SyncEnums::ENABLE_SYNC_ON_ACCOUNT:
       return ENABLE_SYNC_ON_ACCOUNT;
     case sync_pb::SyncEnums::STOP_AND_RESTART_SYNC:
       return STOP_AND_RESTART_SYNC;
     case sync_pb::SyncEnums::DISABLE_SYNC_ON_CLIENT:
       return DISABLE_SYNC_ON_CLIENT;
+    case sync_pb::SyncEnums::DISABLE_SYNC_AND_ROLLBACK:
+      return DISABLE_SYNC_AND_ROLLBACK;
     case sync_pb::SyncEnums::UNKNOWN_ACTION:
       return UNKNOWN_ACTION;
     default:
       NOTREACHED();
       return UNKNOWN_ACTION;
   }
 }
 
 }  // namespace
 
@@ skipping 409 matching lines @@
 std::string SyncerProtoUtil::ClientToServerResponseDebugString(
     const ClientToServerResponse& response) {
   // Add more handlers as needed.
   std::string output;
   if (response.has_get_updates())
     output.append(GetUpdatesResponseString(response.get_updates()));
   return output;
 }
 
 }  // namespace syncer