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

net/quic/quic_stream_factory.h

Index: net/quic/quic_stream_factory.h
diff --git a/net/quic/quic_stream_factory.h b/net/quic/quic_stream_factory.h
index e019944208d99c5d3e61343a312bb62cfad92e78..3620bc3594fb74af86e415fc3a7d1ae9f8d21145 100644
--- a/net/quic/quic_stream_factory.h
+++ b/net/quic/quic_stream_factory.h
@@ -65,8 +65,7 @@ class NET_EXPORT_PRIVATE QuicStreamFactory {
   QuicStreamFactory(HostResolver* host_resolver,
                     ClientSocketFactory* client_socket_factory,
                     QuicRandom* random_generator,
-                    QuicClock* clock,
-                    bool use_spdy_over_quic);
+                    QuicClock* clock);
   virtual ~QuicStreamFactory();
 
   // Creates a new QuicHttpStream to |host_port_proxy_pair| which will be
@@ -134,9 +133,6 @@ class NET_EXPORT_PRIVATE QuicStreamFactory {
   JobRequestsMap job_requests_map_;
   RequestMap active_requests_;
 
-  // True of request should be encoded using SPDY header blocks.
-  bool use_spdy_over_quic_;
-
   base::WeakPtrFactory<QuicStreamFactory> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicStreamFactory);