diff -r 000000000000 -r 6474c204b198 gfx/angle/src/compiler/compiler_debug.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/compiler/compiler_debug.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+//
+// 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.
+//
+
+// compiler_debug.cpp: Debugging utilities.
+
+#include "compiler/compiler_debug.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#include "compiler/InitializeParseContext.h"
+#include "compiler/ParseHelper.h"
+
+static const int kTraceBufferLen = 1024;
+
+#ifdef TRACE_ENABLED
+extern "C" {
+void Trace(const char *format, ...) {
+    if (!format) return;
+
+    TParseContext* parseContext = GetGlobalParseContext();
+    if (parseContext) {
+        char buf[kTraceBufferLen];
+        va_list args;
+        va_start(args, format);
+        vsnprintf(buf, kTraceBufferLen, format, args);
+        va_end(args);
+
+        parseContext->trace(buf);
+    }
+}
+}  // extern "C"
+#endif  // TRACE_ENABLED
+