diff -r 000000000000 -r 6474c204b198 gfx/angle/src/compiler/SearchSymbol.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/compiler/SearchSymbol.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+//
+// Copyright (c) 2002-2010 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.
+//
+// SearchSymbol is an AST traverser to detect the use of a given symbol name
+//
+
+#ifndef COMPILER_SEARCHSYMBOL_H_
+#define COMPILER_SEARCHSYMBOL_H_
+
+#include "compiler/intermediate.h"
+#include "compiler/ParseHelper.h"
+
+namespace sh
+{
+class SearchSymbol : public TIntermTraverser
+{
+  public:
+    SearchSymbol(const TString &symbol);
+
+    void traverse(TIntermNode *node);
+    void visitSymbol(TIntermSymbol *symbolNode);
+
+    bool foundMatch() const;
+
+  protected:
+    const TString &mSymbol;
+    bool match;
+};
+}
+
+#endif   // COMPILER_SEARCHSYMBOL_H_