Refactored OpenGL embedder that works on Android, Mac or Linux.

runtime/embedders/openglui/common/timer.h

Index: runtime/embedders/openglui/common/timer.h
===================================================================
--- runtime/embedders/openglui/common/timer.h	(revision 0)
+++ runtime/embedders/openglui/common/timer.h	(revision 0)
@@ -0,0 +1,24 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef EMBEDDERS_OPENGLUI_COMMON_TIMER_H_
+#define EMBEDDERS_OPENGLUI_COMMON_TIMER_H_
+
+#include <time.h>
+
+class Timer {
+ public:
+  Timer();
+  void reset();
+  void update();
+  double now();
+  float elapsed();
+
+ private:
+  float elapsed_;
+  double last_time_;
+};
+
+#endif  // EMBEDDERS_OPENGLUI_COMMON_TIMER_H_
+