Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/blenlib/BLI_asan.h

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+/* SPDX-FileCopyrightText: 2023 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup bli
+ */
+
+#pragma once
+
+/* Clang defines this. */
+#ifndef __has_feature
+#  define __has_feature(x) 0
+#endif
+
+#if (defined(__SANITIZE_ADDRESS__) || __has_feature(address_sanitizer)) && \
+    (!defined(_MSC_VER) || _MSC_VER > 1929) /* MSVC 2019 and below doesn't ship ASAN headers. */
+#  include "sanitizer/asan_interface.h"
+#  define WITH_ASAN
+#else
+/* Ensure return value is used. Just using UNUSED_VARS results in a warning. */
+#  define ASAN_POISON_MEMORY_REGION(addr, size) (void)(0 && ((size) != 0 && (addr) != NULL))
+#  define ASAN_UNPOISON_MEMORY_REGION(addr, size) (void)(0 && ((size) != 0 && (addr) != NULL))
+#endif
+
+/**
+ * Mark a region of memory as "freed". When using address sanitizer, accessing the given memory
+ * region will cause an use-after-poison error. This can be used to find errors when dealing with
+ * uninitialized memory in custom containers.
+ */
+#define BLI_asan_poison(addr, size) ASAN_POISON_MEMORY_REGION(addr, size)
+
+/**
+ * Mark a region of memory as usable again.
+ */
+#define BLI_asan_unpoison(addr, size) ASAN_UNPOISON_MEMORY_REGION(addr, size)