import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/gl/GLDebugUtils.h

@@ -0,0 +1,19 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GLDEBUGUTILS_H_
+#define GLDEBUGUTILS_H_
+
+#include "GLTypes.h"
+
+namespace mozilla {
+namespace gl {
+
+const char* GLenumToStr(GLenum e);
+
+} // namespace gl
+} // namespace mozilla
+
+#endif // !GLDEBUGUTILS_H_