Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/util/map.h

@@ -0,0 +1,24 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include <map>
+#include <unordered_map>
+
+CCL_NAMESPACE_BEGIN
+
+using std::map;
+using std::pair;
+using std::unordered_map;
+using std::unordered_multimap;
+
+template<typename T> static void map_free_memory(T &data)
+{
+  /* Use swap() trick to actually free all internal memory. */
+  T empty_data;
+  data.swap(empty_data);
+}
+
+CCL_NAMESPACE_END