gfe-relnote: deprecate gfe2_reloadable_flag_quic_do_not_send_settings.

PiperOrigin-RevId: 275925308
Change-Id: I9e38a2bd66891ab158894952d14a86420e295680

quic/core/http/quic_spdy_session.cc

diff --git a/quic/core/http/quic_spdy_session.cc b/quic/core/http/quic_spdy_session.cc
index 474dc0b..513d270 100644
--- a/quic/core/http/quic_spdy_session.cc
+++ b/quic/core/http/quic_spdy_session.cc
@@ -601,20 +601,7 @@
     // created HTTP/3 unidirectional streams.
     qpack_encoder_send_stream_->MaybeSendStreamType();
     qpack_decoder_send_stream_->MaybeSendStreamType();
-    return;
   }
-  if (GetQuicReloadableFlag(quic_do_not_send_settings)) {
-    QUIC_RELOADABLE_FLAG_COUNT(quic_do_not_send_settings);
-    return;
-  }
-
-  SpdySettingsIR settings_frame;
-  settings_frame.AddSetting(SETTINGS_MAX_HEADER_LIST_SIZE,
-                            max_inbound_header_list_size_);
-
-  SpdySerializedFrame frame(spdy_framer_.SerializeFrame(settings_frame));
-  headers_stream()->WriteOrBufferData(
-      QuicStringPiece(frame.data(), frame.size()), false, nullptr);
 }
 
 QpackEncoder* QuicSpdySession::qpack_encoder() {

quic/core/http/quic_spdy_session_test.cc

diff --git a/quic/core/http/quic_spdy_session_test.cc b/quic/core/http/quic_spdy_session_test.cc
index c4eb3c7..1dd05d1 100644
--- a/quic/core/http/quic_spdy_session_test.cc
+++ b/quic/core/http/quic_spdy_session_test.cc
@@ -456,8 +456,7 @@
 }
 
 TEST_P(QuicSpdySessionTestServer, IsCryptoHandshakeConfirmed) {
-  if (!GetQuicReloadableFlag(quic_do_not_send_settings) ||
-      VersionUsesHttp3(transport_version())) {
+  if (VersionUsesHttp3(transport_version())) {
     MockPacketWriter* writer = static_cast<MockPacketWriter*>(
         QuicConnectionPeer::GetWriter(session_.connection()));
     EXPECT_CALL(*writer, WritePacket(_, _, _, _, _))
@@ -1062,8 +1061,7 @@
 }
 
 TEST_P(QuicSpdySessionTestServer, IncreasedTimeoutAfterCryptoHandshake) {
-  if (!GetQuicReloadableFlag(quic_do_not_send_settings) ||
-      VersionUsesHttp3(transport_version())) {
+  if (VersionUsesHttp3(transport_version())) {
     MockPacketWriter* writer = static_cast<MockPacketWriter*>(
         QuicConnectionPeer::GetWriter(session_.connection()));
     EXPECT_CALL(*writer, WritePacket(_, _, _, _, _))