diff --git a/quic/core/http/http_constants.cc b/quic/core/http/http_constants.cc
new file mode 100644
index 0000000..b3262d2
--- /dev/null
+++ b/quic/core/http/http_constants.cc
@@ -0,0 +1,26 @@
+// Copyright (c) 2021 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.
+
+#include "quic/core/http/http_constants.h"
+
+#include "absl/strings/str_cat.h"
+
+namespace quic {
+
+#define RETURN_STRING_LITERAL(x) \
+  case x:                        \
+    return #x;
+
+std::string H3SettingsToString(Http3AndQpackSettingsIdentifiers identifier) {
+  switch (identifier) {
+    RETURN_STRING_LITERAL(SETTINGS_QPACK_MAX_TABLE_CAPACITY);
+    RETURN_STRING_LITERAL(SETTINGS_MAX_FIELD_SECTION_SIZE);
+    RETURN_STRING_LITERAL(SETTINGS_QPACK_BLOCKED_STREAMS);
+  }
+  return absl::StrCat("UNSUPPORTED_SETTINGS_TYPE(", identifier, ")");
+}
+
+#undef RETURN_STRING_LITERAL  // undef for jumbo builds
+
+}  // namespace quic
diff --git a/quic/core/http/http_constants.h b/quic/core/http/http_constants.h
index 37ecd20..65096a5 100644
--- a/quic/core/http/http_constants.h
+++ b/quic/core/http/http_constants.h
@@ -6,6 +6,7 @@
 #define QUICHE_QUIC_CORE_HTTP_HTTP_CONSTANTS_H_
 
 #include <cstdint>
+#include <string>
 
 #include "quic/core/quic_types.h"
 
@@ -34,6 +35,9 @@
   SETTINGS_QPACK_BLOCKED_STREAMS = 0x07,
 };
 
+// Returns HTTP/3 SETTINGS identifier as a string.
+std::string H3SettingsToString(Http3AndQpackSettingsIdentifiers identifier);
+
 // Default maximum dynamic table capacity, communicated via
 // SETTINGS_QPACK_MAX_TABLE_CAPACITY.
 const QuicByteCount kDefaultQpackMaxDynamicTableCapacity = 64 * 1024;  // 64 KB
@@ -47,6 +51,7 @@
 const uint64_t kDefaultMaximumBlockedStreams = 100;
 
 const char kUserAgentHeaderName[] = "user-agent";
+
 }  // namespace quic
 
 #endif  // QUICHE_QUIC_CORE_HTTP_HTTP_CONSTANTS_H_
diff --git a/quic/core/http/http_decoder.cc b/quic/core/http/http_decoder.cc
index 79ef921..a7df361 100644
--- a/quic/core/http/http_decoder.cc
+++ b/quic/core/http/http_decoder.cc
@@ -14,6 +14,7 @@
 #include "quic/core/quic_error_codes.h"
 #include "quic/core/quic_types.h"
 #include "quic/platform/api/quic_bug_tracker.h"
+#include "quic/platform/api/quic_flag_utils.h"
 #include "quic/platform/api/quic_flags.h"
 #include "quic/platform/api/quic_logging.h"
 
diff --git a/quic/core/http/http_encoder.cc b/quic/core/http/http_encoder.cc
index 80a3107..50717fd 100644
--- a/quic/core/http/http_encoder.cc
+++ b/quic/core/http/http_encoder.cc
@@ -9,6 +9,8 @@
 #include "quic/core/crypto/quic_random.h"
 #include "quic/core/quic_data_writer.h"
 #include "quic/core/quic_types.h"
+#include "quic/platform/api/quic_bug_tracker.h"
+#include "quic/platform/api/quic_flag_utils.h"
 #include "quic/platform/api/quic_flags.h"
 #include "quic/platform/api/quic_logging.h"
 
diff --git a/quic/core/http/http_frames.h b/quic/core/http/http_frames.h
index 4708ec1..6669242 100644
--- a/quic/core/http/http_frames.h
+++ b/quic/core/http/http_frames.h
@@ -13,9 +13,8 @@
 
 #include "absl/strings/str_cat.h"
 #include "absl/strings/string_view.h"
-#include "quic/core/http/spdy_utils.h"
+#include "quic/core/http/http_constants.h"
 #include "quic/core/quic_types.h"
-#include "spdy/core/spdy_framer.h"
 
 namespace quic {
 
@@ -84,7 +83,7 @@
     std::string s;
     for (auto it : values) {
       std::string setting = absl::StrCat(
-          SpdyUtils::H3SettingsToString(
+          H3SettingsToString(
               static_cast<Http3AndQpackSettingsIdentifiers>(it.first)),
           " = ", it.second, "; ");
       absl::StrAppend(&s, setting);
diff --git a/quic/core/http/spdy_utils.cc b/quic/core/http/spdy_utils.cc
index 3b1cd77..a3d800a 100644
--- a/quic/core/http/spdy_utils.cc
+++ b/quic/core/http/spdy_utils.cc
@@ -153,20 +153,4 @@
   return true;
 }
 
-#define RETURN_STRING_LITERAL(x) \
-  case x:                        \
-    return #x;
-
-// static
-std::string SpdyUtils::H3SettingsToString(
-    Http3AndQpackSettingsIdentifiers identifier) {
-  switch (identifier) {
-    RETURN_STRING_LITERAL(SETTINGS_QPACK_MAX_TABLE_CAPACITY);
-    RETURN_STRING_LITERAL(SETTINGS_MAX_FIELD_SECTION_SIZE);
-    RETURN_STRING_LITERAL(SETTINGS_QPACK_BLOCKED_STREAMS);
-  }
-  return absl::StrCat("UNSUPPORTED_SETTINGS_TYPE(", identifier, ")");
-}
-
-#undef RETURN_STRING_LITERAL  // undef for jumbo builds
 }  // namespace quic
diff --git a/quic/core/http/spdy_utils.h b/quic/core/http/spdy_utils.h
index 9ff3c34..a3b3134 100644
--- a/quic/core/http/spdy_utils.h
+++ b/quic/core/http/spdy_utils.h
@@ -51,10 +51,6 @@
   // which must be fully-qualified.
   static bool PopulateHeaderBlockFromUrl(const std::string url,
                                          spdy::SpdyHeaderBlock* headers);
-
-  // Returns HTTP/3 SETTINGS identifier as a string.
-  static std::string H3SettingsToString(
-      Http3AndQpackSettingsIdentifiers identifier);
 };
 
 }  // namespace quic