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diff --git a/gfx/angle/checkout/src/compiler/translator/tree_ops/RecordConstantPrecision.h b/gfx/angle/checkout/src/compiler/translator/tree_ops/RecordConstantPrecision.h
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+++ b/gfx/angle/checkout/src/compiler/translator/tree_ops/RecordConstantPrecision.h
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+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// During parsing, all constant expressions are folded to constant union nodes. The expressions that
+// have been folded may have had precision qualifiers, which should affect the precision of the
+// consuming operation. If the folded constant union nodes are written to output as such they won't
+// have any precision qualifiers, and their effect on the precision of the consuming operation is
+// lost.
+//
+// RecordConstantPrecision is an AST traverser that inspects the precision qualifiers of constants
+// and hoists the constants outside the containing expression as precision qualified named variables
+// in case that is required for correct precision propagation.
+//
+
+#ifndef COMPILER_TRANSLATOR_TREEOPS_RECORDCONSTANTPRECISION_H_
+#define COMPILER_TRANSLATOR_TREEOPS_RECORDCONSTANTPRECISION_H_
+
+#include "common/angleutils.h"
+
+namespace sh
+{
+class TCompiler;
+class TIntermNode;
+class TSymbolTable;
+
+[[nodiscard]] bool RecordConstantPrecision(TCompiler *compiler,
+                                           TIntermNode *root,
+                                           TSymbolTable *symbolTable);
+}  // namespace sh
+
+#endif  // COMPILER_TRANSLATOR_TREEOPS_RECORDCONSTANTPRECISION_H_