Revert of Unify enum NextProto and enum AlternateProtocol.

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 250 matching lines @@
   // Creates a Value summary of the state of the QUIC sessions and
   // configuration.
   std::unique_ptr<base::Value> QuicInfoToValue() const;
 
   void CloseAllConnections();
   void CloseIdleConnections();
 
   // Returns the original Params used to construct this session.
   const Params& params() const { return params_; }
 
-  bool IsProtocolEnabled(NextProto protocol) const;
+  bool IsProtocolEnabled(AlternateProtocol protocol) const;
 
   // Populates |*alpn_protos| with protocols to be used with ALPN.
   void GetAlpnProtos(NextProtoVector* alpn_protos) const;
 
   // Populates |server_config| and |proxy_config| based on this session and
   // |request|.
   void GetSSLConfig(const HttpRequestInfo& request,
                     SSLConfig* server_config,
                     SSLConfig* proxy_config) const;
 
@@ skipping 33 matching lines @@
   NextProtoVector next_protos_;
 
   Params params_;
 
   std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_NETWORK_SESSION_H_