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

net/quic/quic_http_stream.h

Index: net/quic/quic_http_stream.h
diff --git a/net/quic/quic_http_stream.h b/net/quic/quic_http_stream.h
index 8e0853cbf6ae523493fc442469c74573013df4b0..6716dd5ee4557304278561b6c1952969925a3e6b 100644
--- a/net/quic/quic_http_stream.h
+++ b/net/quic/quic_http_stream.h
@@ -21,7 +21,7 @@ class NET_EXPORT_PRIVATE QuicHttpStream :
       public QuicReliableClientStream::Delegate,
       public HttpStream {
  public:
-  QuicHttpStream(QuicReliableClientStream* stream, bool use_spdy);
+  explicit QuicHttpStream(QuicReliableClientStream* stream);
 
   virtual ~QuicHttpStream();
 
@@ -113,9 +113,6 @@ class NET_EXPORT_PRIVATE QuicHttpStream :
 
   bool response_headers_received_;
 
-  // True if the request and response bodies should be serialized via SPDY.
-  bool use_spdy_;
-
   // Serialized HTTP request.
   std::string request_;