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diff --git a/gfx/angle/src/compiler/translator/UnfoldShortCircuitAST.h b/gfx/angle/src/compiler/translator/UnfoldShortCircuitAST.h
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+++ b/gfx/angle/src/compiler/translator/UnfoldShortCircuitAST.h
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+//
+// Copyright (c) 2002-2013 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.
+//
+// UnfoldShortCircuitAST is an AST traverser to replace short-circuiting
+// operations with ternary operations.
+//
+
+#ifndef COMPILER_TRANSLATOR_UNFOLDSHORTCIRCUITAST_H_
+#define COMPILER_TRANSLATOR_UNFOLDSHORTCIRCUITAST_H_
+
+#include "common/angleutils.h"
+#include "compiler/translator/IntermNode.h"
+
+namespace sh
+{
+
+// This traverser identifies all the short circuit binary  nodes that need to
+// be replaced, and creates the corresponding replacement nodes. However,
+// the actual replacements happen after the traverse through updateTree().
+
+class UnfoldShortCircuitAST : public TIntermTraverser
+{
+  public:
+    UnfoldShortCircuitAST()
+        : TIntermTraverser(true, false, false)
+    {
+    }
+
+    bool visitBinary(Visit visit, TIntermBinary *) override;
+};
+
+}  // namespace sh
+
+#endif  // COMPILER_TRANSLATOR_UNFOLDSHORTCIRCUITAST_H_