Add WebSocketError to indicate decoding failure reason

net/websockets/websocket_errors.h

+// 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.
+
+#ifndef NET_WEBSOCKETS_WEBSOCKET_ERRORS_H_
+#define NET_WEBSOCKETS_WEBSOCKET_ERRORS_H_
+
+#include "net/base/net_errors.h"
+
+namespace net {
+
+// Error values for WebSocket framing.
+// This values are compatible to RFC6455 defined status codes.
+enum WebSocketError {
+  WEB_SOCKET_OK = 1000,
+  WEB_SOCKET_ERR_PROTOCOL_ERROR = 1002,
+  WEB_SOCKET_ERR_MESSAGE_TOO_BIG = 1009
+};
+
+// Convert WebSocketError to net::Error defined in net/base/net_errors.h.
+Error WebSocketErrorToNetError(WebSocketError error);
+
+}  // namespace net
+
+#endif  // NET_WEBSOCKETS_WEBSOCKET_FRAME_H_