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

runtime/embedders/openglui/common/lifecycle_handler.h

+// 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_LIFECYCLE_HANDLER_H_
+#define EMBEDDERS_OPENGLUI_COMMON_LIFECYCLE_HANDLER_H_
+
+class LifeCycleHandler {
+  public:
+    virtual int32_t OnActivate() = 0;
+    virtual void OnDeactivate() = 0;
+    virtual int32_t OnStep() = 0;
+    virtual void OnStart() {}
+    virtual void OnResume() {}
+    virtual void OnPause() {}
+    virtual void OnStop() {}
+    virtual void OnDestroy() {}
+    virtual void OnSaveState(void** data, size_t* size) {}
+    virtual void OnConfigurationChanged() {}
+    virtual void OnLowMemory() {}
+    virtual void OnCreateWindow() {}
+    virtual void OnDestroyWindow() {}
+    virtual void OnGainedFocus() {}
+    virtual void OnLostFocus() {}
+    virtual ~LifeCycleHandler() {}
+};
+
+#endif  // EMBEDDERS_OPENGLUI_COMMON_LIFECYCLE_HANDLER_H_
+