QuicServer: Use Chrome's header parsing rather than Balsa

net/quic/spdy_utils.h

 // Copyright (c) 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.
 
 #ifndef NET_QUIC_SPDY_UTILS_H_
 #define NET_QUIC_SPDY_UTILS_H_
 
 #include <string>
 
 #include "net/base/net_export.h"
 #include "net/spdy/spdy_framer.h"
 
 namespace net {
 
+const SpdyMajorVersion kDefaultSpdyMajorVersion = SPDY3;
+
 class NET_EXPORT_PRIVATE SpdyUtils {
  public:
   static std::string SerializeUncompressedHeaders(
       const SpdyHeaderBlock& headers);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SpdyUtils);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_SPDY_UTILS_H_