[libjxl] Modify the header files that libjxl needs to generate

src/third_party/libjxl/gen_headers/jxl/jxl_export.h

@@ -1,4 +1,4 @@
-// Copyright 2020 The Chromium Authors
+// Copyright 2023 The Chromium Authors, Alex313031, gz83, and mo271
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -9,3 +9,46 @@
 #define JXL_DEPRECATED
 
 #endif  // THIRD_PARTY_LIBJXL_GEN_HEADERS_JXL_JXL_EXPORT_H_
+
+#ifndef JXL_THREADS_EXPORT_H
+#define JXL_THREADS_EXPORT_H
+
+#ifdef JXL_THREADS_STATIC_DEFINE
+#define JXL_THREADS_EXPORT
+#define JXL_THREADS_NO_EXPORT
+#else
+#ifndef JXL_THREADS_EXPORT
+#ifdef JXL_THREADS_INTERNAL_LIBRARY_BUILD
+/* We are building this library */
+#define JXL_THREADS_EXPORT __attribute__((visibility("default")))
+#else
+/* We are using this library */
+#define JXL_THREADS_EXPORT __attribute__((visibility("default")))
+#endif
+#endif
+
+#ifndef JXL_THREADS_NO_EXPORT
+#define JXL_THREADS_NO_EXPORT __attribute__((visibility("hidden")))
+#endif
+#endif
+
+#ifndef JXL_THREADS_DEPRECATED
+#define JXL_THREADS_DEPRECATED __attribute__((__deprecated__))
+#endif
+
+#ifndef JXL_THREADS_DEPRECATED_EXPORT
+#define JXL_THREADS_DEPRECATED_EXPORT JXL_THREADS_EXPORT JXL_THREADS_DEPRECATED
+#endif
+
+#ifndef JXL_THREADS_DEPRECATED_NO_EXPORT
+#define JXL_THREADS_DEPRECATED_NO_EXPORT \
+  JXL_THREADS_NO_EXPORT JXL_THREADS_DEPRECATED
+#endif
+
+#if 0 /* DEFINE_NO_DEPRECATED */
+#ifndef JXL_THREADS_NO_DEPRECATED
+#define JXL_THREADS_NO_DEPRECATED
+#endif
+#endif
+
+#endif /* JXL_THREADS_EXPORT_H */