Remove an unused file defining WebSocket multiplexing related constants

net/websockets/websocket_mux.h

-// Copyright 2013 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_MUX_H_
-#define NET_WEBSOCKETS_WEBSOCKET_MUX_H_
-
-namespace net {
-
-// Reason codes used by the mux extension.
-enum WebSocketMuxError {
-  // Codes starting with 2000 apply to the physical connection. They are used
-  // for dropping the control channel.
-  kWebSocketMuxErrorPhysicalConnectionFailed = 2000,
-  kWebSocketMuxErrorInvalidEncapsulatingMessage = 2001,
-  kWebSocketMuxErrorChannelIdTruncated = 2002,
-  kWebSocketMuxErrorEncapsulatedFrameIsTruncated = 2003,
-  kWebSocketMuxErrorUnknownMuxOpcode = 2004,
-  kWebSocketMuxErrorInvalidMuxControlBlock = 2005,
-  kWebSocketMuxErrorChannelAlreadyExists = 2006,
-  kWebSocketMuxErrorNewChannelSlotViolation = 2007,
-  kWebSocketMuxErrorNewChannelSlotOverflow = 2008,
-  kWebSocketMuxErrorBadRequest = 2009,
-  kWebSocketMuxErrorUnknownRequestEncoding = 2010,
-  kWebSocketMuxErrorBadResponse = 2011,
-  kWebSocketMuxErrorUnknownResponseEncoding = 2012,
-
-  // Codes starting with 3000 apply to the logical connection.
-  kWebSocketMuxErrorLogicalChannelFailed = 3000,
-  kWebSocketMuxErrorSendQuotaViolation = 3005,
-  kWebSocketMuxErrorSendQuotaOverflow = 3006,
-  kWebSocketMuxErrorIdleTimeout = 3007,
-  kWebSocketMuxErrorDropChannelAck = 3008,
-  kWebSocketMuxErrorBadFragmentation = 3009,
-};
-
-}  // namespace net
-
-#endif  // NET_WEBSOCKETS_WEBSOCKET_MUX_H_