[Sync] Update session protos.

chrome/browser/sync/protocol/proto_enum_conversions.cc

 // 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.
 
 // Keep this file in sync with the .proto files in this directory.
 
 #include "chrome/browser/sync/protocol/proto_enum_conversions.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 71 matching lines @@
     ENUM_CASE(sync_pb::GetUpdatesCallerInfo, CLEAR_PRIVATE_DATA);
     ENUM_CASE(sync_pb::GetUpdatesCallerInfo, NEWLY_SUPPORTED_DATATYPE);
     ENUM_CASE(sync_pb::GetUpdatesCallerInfo, MIGRATION);
     ENUM_CASE(sync_pb::GetUpdatesCallerInfo, NEW_CLIENT);
     ENUM_CASE(sync_pb::GetUpdatesCallerInfo, RECONFIGURATION);
   }
   NOTREACHED();
   return "";
 }
 
+const char* GetDeviceTypeString(
+    sync_pb::SessionHeader::DeviceType device_type) {
+  ASSERT_ENUM_BOUNDS(sync_pb::SessionHeader, DeviceType, TYPE_PC, TYPE_CROS);
+  switch (device_type) {
+    ENUM_CASE(sync_pb::SessionHeader, TYPE_PC);
+    ENUM_CASE(sync_pb::SessionHeader, TYPE_CROS);
+  }
+  NOTREACHED();
+  return "";
+}
+
 #undef ASSERT_ENUM_BOUNDS
 #undef ENUM_CASE
 
 }  // namespace