diff --git a/quic/core/http/end_to_end_test.cc b/quic/core/http/end_to_end_test.cc
index c58d82f..5b9468f 100644
--- a/quic/core/http/end_to_end_test.cc
+++ b/quic/core/http/end_to_end_test.cc
@@ -12,6 +12,7 @@
 #include <vector>
 
 #include "net/third_party/quiche/src/quic/core/crypto/null_encrypter.h"
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/core/http/quic_spdy_client_stream.h"
 #include "net/third_party/quiche/src/quic/core/qpack/qpack_encoder_test_utils.h"
 #include "net/third_party/quiche/src/quic/core/quic_epoll_connection_helper.h"
diff --git a/quic/core/http/http_constants.h b/quic/core/http/http_constants.h
new file mode 100644
index 0000000..2641790
--- /dev/null
+++ b/quic/core/http/http_constants.h
@@ -0,0 +1,32 @@
+// Copyright (c) 2019 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 QUICHE_QUIC_CORE_HTTP_HTTP_CONSTANTS_H_
+#define QUICHE_QUIC_CORE_HTTP_HTTP_CONSTANTS_H_
+
+#include <cstdint>
+
+namespace quic {
+
+// Unidirectional stream types.
+
+// https://quicwg.org/base-drafts/draft-ietf-quic-http.html#unidirectional-streams
+const uint64_t kControlStream = 0x00;
+const uint64_t kServerPushStream = 0x01;
+// https://quicwg.org/base-drafts/draft-ietf-quic-qpack.html#enc-dec-stream-def
+const uint64_t kQpackEncoderStream = 0x02;
+const uint64_t kQpackDecoderStream = 0x03;
+
+// Settings identifiers.
+
+// https://quicwg.org/base-drafts/draft-ietf-quic-http.html#settings-parameters
+const uint64_t kSettingsMaxHeaderListSize = 0x06;
+const uint64_t kSettingsNumPlaceholders = 0x09;
+// https://quicwg.org/base-drafts/draft-ietf-quic-qpack.html#configuration
+const uint64_t kSettingsQpackMaxTableCapacity = 0x01;
+const uint64_t kSettingsQpackBlockedStream = 0x07;
+
+}  // namespace quic
+
+#endif  // QUICHE_QUIC_CORE_HTTP_HTTP_CONSTANTS_H_
diff --git a/quic/core/http/quic_receive_control_stream.cc b/quic/core/http/quic_receive_control_stream.cc
index 66b7be6..bc36589 100644
--- a/quic/core/http/quic_receive_control_stream.cc
+++ b/quic/core/http/quic_receive_control_stream.cc
@@ -4,6 +4,7 @@
 
 #include "net/third_party/quiche/src/quic/core/http/quic_receive_control_stream.h"
 
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/core/http/http_decoder.h"
 #include "net/third_party/quiche/src/quic/core/http/quic_spdy_session.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_ptr_util.h"
diff --git a/quic/core/http/quic_receive_control_stream_test.cc b/quic/core/http/quic_receive_control_stream_test.cc
index 3601cff..aaf60e9 100644
--- a/quic/core/http/quic_receive_control_stream_test.cc
+++ b/quic/core/http/quic_receive_control_stream_test.cc
@@ -4,6 +4,7 @@
 
 #include "net/third_party/quiche/src/quic/core/http/quic_receive_control_stream.h"
 
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/core/quic_utils.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_ptr_util.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_text_utils.h"
diff --git a/quic/core/http/quic_send_control_stream.cc b/quic/core/http/quic_send_control_stream.cc
index 7943bdc..0634d03 100644
--- a/quic/core/http/quic_send_control_stream.cc
+++ b/quic/core/http/quic_send_control_stream.cc
@@ -4,6 +4,7 @@
 
 #include "net/third_party/quiche/src/quic/core/http/quic_send_control_stream.h"
 
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/core/http/quic_spdy_session.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_arraysize.h"
 
diff --git a/quic/core/http/quic_spdy_session.cc b/quic/core/http/quic_spdy_session.cc
index 4a8dad7..8bbe7a4 100644
--- a/quic/core/http/quic_spdy_session.cc
+++ b/quic/core/http/quic_spdy_session.cc
@@ -9,6 +9,7 @@
 #include <string>
 #include <utility>
 
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/core/http/quic_headers_stream.h"
 #include "net/third_party/quiche/src/quic/core/quic_utils.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_bug_tracker.h"
diff --git a/quic/core/http/quic_spdy_session.h b/quic/core/http/quic_spdy_session.h
index 1acdbd5..d381d8c 100644
--- a/quic/core/http/quic_spdy_session.h
+++ b/quic/core/http/quic_spdy_session.h
@@ -31,16 +31,6 @@
 class QuicSpdySessionPeer;
 }  // namespace test
 
-// Unidirectional stream types defined by IETF HTTP/3 draft in section 3.2.
-const uint64_t kControlStream = 0;
-const uint64_t kServerPushStream = 1;
-const uint64_t kQpackEncoderStream = 2;
-const uint64_t kQpackDecoderStream = 3;
-
-// Supported Settings id as defined by IETF HTTP/3 draft in section 7.2.5.1.
-const uint64_t kSettingsMaxHeaderListSize = 6;
-const uint64_t kSettingsNumPlaceholders = 8;
-
 // QuicHpackDebugVisitor gathers data used for understanding HPACK HoL
 // dynamics.  Specifically, it is to help predict the compression
 // penalty of avoiding HoL by chagning how the dynamic table is used.
diff --git a/quic/core/http/quic_spdy_session_test.cc b/quic/core/http/quic_spdy_session_test.cc
index 36fd20c..35aa1c7 100644
--- a/quic/core/http/quic_spdy_session_test.cc
+++ b/quic/core/http/quic_spdy_session_test.cc
@@ -11,6 +11,7 @@
 
 #include "net/third_party/quiche/src/quic/core/crypto/crypto_protocol.h"
 #include "net/third_party/quiche/src/quic/core/crypto/null_encrypter.h"
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/core/quic_crypto_stream.h"
 #include "net/third_party/quiche/src/quic/core/quic_data_writer.h"
 #include "net/third_party/quiche/src/quic/core/quic_packets.h"
diff --git a/quic/core/http/quic_spdy_stream.cc b/quic/core/http/quic_spdy_stream.cc
index 55ae33f..b55e928 100644
--- a/quic/core/http/quic_spdy_stream.cc
+++ b/quic/core/http/quic_spdy_stream.cc
@@ -8,6 +8,7 @@
 #include <string>
 #include <utility>
 
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/core/http/http_decoder.h"
 #include "net/third_party/quiche/src/quic/core/http/quic_spdy_session.h"
 #include "net/third_party/quiche/src/quic/core/http/spdy_utils.h"
diff --git a/quic/core/qpack/qpack_send_stream_test.cc b/quic/core/qpack/qpack_send_stream_test.cc
index 5fee70f..46037c9 100644
--- a/quic/core/qpack/qpack_send_stream_test.cc
+++ b/quic/core/qpack/qpack_send_stream_test.cc
@@ -4,6 +4,7 @@
 
 #include "net/third_party/quiche/src/quic/core/qpack/qpack_send_stream.h"
 
+#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
 #include "net/third_party/quiche/src/quic/test_tools/quic_spdy_session_peer.h"
 #include "net/third_party/quiche/src/quic/test_tools/quic_test_utils.h"