Get rid of websocket_over_spdy_enabled global.

chrome/browser/io_thread.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 CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 149 matching lines @@
     Optional<bool> force_spdy_single_domain;
     Optional<bool> enable_spdy_compression;
     Optional<bool> enable_spdy_ping_based_connection_checking;
     Optional<net::NextProto> spdy_default_protocol;
     net::NextProtoVector next_protos;
     Optional<string> trusted_spdy_proxy;
     Optional<bool> force_spdy_over_ssl;
     Optional<bool> force_spdy_always;
     std::set<net::HostPortPair> forced_spdy_exclusions;
     Optional<bool> use_alternate_protocols;
+    Optional<bool> enable_websocket_over_spdy;
 
     Optional<bool> enable_quic;
     Optional<bool> enable_quic_https;
     Optional<bool> enable_quic_pacing;
     Optional<bool> enable_quic_time_based_loss_detection;
     Optional<bool> enable_quic_persist_server_info;
     Optional<bool> enable_quic_port_selection;
     Optional<size_t> quic_max_packet_length;
     Optional<net::QuicVersionVector> quic_supported_versions;
     Optional<net::HostPortPair> origin_to_force_quic_on;
@@ skipping 191 matching lines @@
   bool is_spdy_disabled_by_policy_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   const base::TimeTicks creation_time_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_