Remove the --use-spdy-over-quic command line option. Always use SPDY over QUIC.

net/http/http_network_session.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_HTTP_HTTP_NETWORK_SESSION_H_
 #define NET_HTTP_HTTP_NETWORK_SESSION_H_
 
 #include <set>
 #include "base/memory/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
@@ skipping 65 matching lines @@
     bool enable_spdy_compression;
     bool enable_spdy_ping_based_connection_checking;
     NextProto spdy_default_protocol;
     size_t spdy_stream_initial_recv_window_size;
     size_t spdy_initial_max_concurrent_streams;
     size_t spdy_max_concurrent_streams_limit;
     SpdySessionPool::TimeFunc time_func;
     std::string trusted_spdy_proxy;
     bool enable_quic;
     uint16 origin_port_to_force_quic_on;
-    bool use_spdy_over_quic;
     QuicClock* quic_clock;  // Will be owned by QuicStreamFactory.
     QuicRandom* quic_random;
     bool enable_user_alternate_protocol_ports;
   };
 
   enum SocketPoolType {
     NORMAL_SOCKET_POOL,
     WEBSOCKET_SOCKET_POOL,
     NUM_SOCKET_POOL_TYPES
   };
@@ skipping 93 matching lines @@
   SpdySessionPool spdy_session_pool_;
   scoped_ptr<HttpStreamFactory> http_stream_factory_;
   std::set<HttpResponseBodyDrainer*> response_drainers_;
 
   Params params_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_NETWORK_SESSION_H_