Remove an unused file defining WebSocket multiplexing related constants

net/websockets/websocket_channel.cc

 // 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.
 
 #include "net/websockets/websocket_channel.h"
 
 #include <limits.h>  // for INT_MAX
 #include <stddef.h>
 
 #include <algorithm>
@@ skipping 17 matching lines @@
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
 #include "net/log/net_log_with_source.h"
 #include "net/websockets/websocket_errors.h"
 #include "net/websockets/websocket_event_interface.h"
 #include "net/websockets/websocket_frame.h"
 #include "net/websockets/websocket_handshake_request_info.h"
 #include "net/websockets/websocket_handshake_response_info.h"
 #include "net/websockets/websocket_handshake_stream_create_helper.h"
-#include "net/websockets/websocket_mux.h"
 #include "net/websockets/websocket_stream.h"
 #include "url/origin.h"
 
 namespace net {
 
 namespace {
 
 using base::StreamingUtf8Validator;
 
 const int kDefaultSendQuotaLowWaterMark = 1 << 16;
@@ skipping 1148 matching lines @@
 }
 
 void WebSocketChannel::CloseTimeout() {
   stream_->Close();
   SetState(CLOSED);
   DoDropChannel(false, kWebSocketErrorAbnormalClosure, "");
   // |this| has been deleted.
 }
 
 }  // namespace net