diff -r 000000000000 -r 6474c204b198 gfx/angle/src/compiler/SearchSymbol.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/compiler/SearchSymbol.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+//
+// 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
+//
+
+#include "compiler/SearchSymbol.h"
+
+#include "compiler/InfoSink.h"
+#include "compiler/OutputHLSL.h"
+
+namespace sh
+{
+SearchSymbol::SearchSymbol(const TString &symbol) : mSymbol(symbol)
+{
+    match = false;
+}
+
+void SearchSymbol::traverse(TIntermNode *node)
+{
+    node->traverse(this);
+}
+
+void SearchSymbol::visitSymbol(TIntermSymbol *symbolNode)
+{
+    if (symbolNode->getSymbol() == mSymbol)
+    {
+        match = true;
+    }
+}
+
+bool SearchSymbol::foundMatch() const
+{
+    return match;
+}
+}