remove num_expected_unidirectional_static_streams_ from QuicSession.

gfe-relnote: no behavior change. not protected.
PiperOrigin-RevId: 309085887
Change-Id: Iddcdb676c27e50e61654b41be754350f201a018a
diff --git a/quic/core/http/end_to_end_test.cc b/quic/core/http/end_to_end_test.cc
index 1baa8b8..186e104 100644
--- a/quic/core/http/end_to_end_test.cc
+++ b/quic/core/http/end_to_end_test.cc
@@ -1749,7 +1749,7 @@
           client_session->connection()->transport_version())
           ? QuicSessionPeer::v99_streamid_manager(client_session)
                     ->max_outgoing_unidirectional_streams() -
-                client_session->num_expected_unidirectional_static_streams()
+                kHttp3StaticUnidirectionalStreamCount
           : QuicSessionPeer::GetStreamIdManager(client_session)
                 ->max_open_outgoing_streams();
   EXPECT_EQ(kServerMaxDynamicStreams,
@@ -1770,7 +1770,7 @@
           server_session->connection()->transport_version())
           ? QuicSessionPeer::v99_streamid_manager(server_session)
                     ->max_outgoing_unidirectional_streams() -
-                server_session->num_expected_unidirectional_static_streams()
+                kHttp3StaticUnidirectionalStreamCount
           : QuicSessionPeer::GetStreamIdManager(server_session)
                 ->max_open_outgoing_streams();
   EXPECT_EQ(kClientMaxDynamicStreams,
diff --git a/quic/core/http/http_constants.h b/quic/core/http/http_constants.h
index fbf3069..17afe1b 100644
--- a/quic/core/http/http_constants.h
+++ b/quic/core/http/http_constants.h
@@ -20,6 +20,9 @@
 const uint64_t kQpackEncoderStream = 0x02;
 const uint64_t kQpackDecoderStream = 0x03;
 
+// This includes control stream, QPACK encoder stream, and QPACK decoder stream.
+const QuicStreamCount kHttp3StaticUnidirectionalStreamCount = 3;
+
 // HTTP/3 and QPACK settings identifiers.
 // https://quicwg.org/base-drafts/draft-ietf-quic-http.html#settings-parameters
 // https://quicwg.org/base-drafts/draft-ietf-quic-qpack.html#configuration
diff --git a/quic/core/http/quic_spdy_client_session_test.cc b/quic/core/http/quic_spdy_client_session_test.cc
index ce0cf9f..9ea6128 100644
--- a/quic/core/http/quic_spdy_client_session_test.cc
+++ b/quic/core/http/quic_spdy_client_session_test.cc
@@ -165,8 +165,7 @@
     QuicConfig config = DefaultQuicConfig();
     if (VersionHasIetfQuicFrames(connection_->transport_version())) {
       config.SetMaxUnidirectionalStreamsToSend(
-          server_max_incoming_streams +
-          session_->num_expected_unidirectional_static_streams());
+          server_max_incoming_streams + kHttp3StaticUnidirectionalStreamCount);
       config.SetMaxBidirectionalStreamsToSend(server_max_incoming_streams);
     } else {
       config.SetMaxBidirectionalStreamsToSend(server_max_incoming_streams);
diff --git a/quic/core/http/quic_spdy_session.cc b/quic/core/http/quic_spdy_session.cc
index c5ed028..d00bf9a 100644
--- a/quic/core/http/quic_spdy_session.cc
+++ b/quic/core/http/quic_spdy_session.cc
@@ -376,7 +376,9 @@
                   config,
                   supported_versions,
                   /*num_expected_unidirectional_static_streams = */
-                  VersionUsesHttp3(connection->transport_version()) ? 3 : 0),
+                  VersionUsesHttp3(connection->transport_version())
+                      ? kHttp3StaticUnidirectionalStreamCount
+                      : 0),
       send_control_stream_(nullptr),
       receive_control_stream_(nullptr),
       qpack_encoder_receive_stream_(nullptr),
@@ -448,8 +450,6 @@
     headers_stream_ = headers_stream.get();
     ActivateStream(std::move(headers_stream));
   } else {
-    ConfigureMaxUnidirectionalStreamsToSend(
-        config()->GetMaxUnidirectionalStreamsToSend());
     qpack_encoder_ = std::make_unique<QpackEncoder>(this);
     qpack_decoder_ =
         std::make_unique<QpackDecoder>(qpack_maximum_dynamic_table_capacity_,
diff --git a/quic/core/http/quic_spdy_session_test.cc b/quic/core/http/quic_spdy_session_test.cc
index 7bc452f..55930e1 100644
--- a/quic/core/http/quic_spdy_session_test.cc
+++ b/quic/core/http/quic_spdy_session_test.cc
@@ -346,8 +346,7 @@
         kInitialSessionFlowControlWindowForTest);
     if (VersionUsesHttp3(transport_version())) {
       QuicConfigPeer::SetReceivedMaxUnidirectionalStreams(
-          session_.config(),
-          session_.num_expected_unidirectional_static_streams());
+          session_.config(), kHttp3StaticUnidirectionalStreamCount);
     }
     QuicConfigPeer::SetReceivedInitialSessionFlowControlWindow(
         session_.config(), kMinimumFlowControlSendWindow);
@@ -1602,7 +1601,8 @@
 
   EXPECT_CALL(
       *connection_,
-      CloseConnection(_, "New unidirectional stream limit is too low.", _));
+      CloseConnection(
+          _, "new unidirectional limit 2 decreases the current limit: 3", _));
   session_.OnConfigNegotiated();
 }