Revert of Unify enum NextProto and enum AlternateProtocol.

net/spdy/spdy_http_stream.cc

Index: net/spdy/spdy_http_stream.cc
diff --git a/net/spdy/spdy_http_stream.cc b/net/spdy/spdy_http_stream.cc
index f371999a3a9c09ec0cf562280b2e188bc5771803..e571615cc8e0c008fd5c62bae8ebed7722e7487a 100644
--- a/net/spdy/spdy_http_stream.cc
+++ b/net/spdy/spdy_http_stream.cc
@@ -50,6 +50,7 @@
       more_read_data_pending_(false),
       direct_(direct),
       was_alpn_negotiated_(false),
+      negotiated_protocol_(kProtoUnknown),
       weak_factory_(this) {
   DCHECK(spdy_session_.get());
 }
@@ -449,6 +450,7 @@
   stream_->SetDelegate(this);
   stream_->GetSSLInfo(&ssl_info_);
   was_alpn_negotiated_ = stream_->WasNpnNegotiated();
+  negotiated_protocol_ = stream_->GetNegotiatedProtocol();
 }
 
 void SpdyHttpStream::ResetStreamInternal() {