Update Animation Plugin to use OpenGL.

Change-Id: Ib20fa69422a0dae804c95f71b70a65027ad8e9cf
diff --git a/samples/BrowserPlugin/jni/PluginObject.h b/samples/BrowserPlugin/jni/PluginObject.h
index 296749a..e0f4424 100644
--- a/samples/BrowserPlugin/jni/PluginObject.h
+++ b/samples/BrowserPlugin/jni/PluginObject.h
@@ -63,7 +63,7 @@
 class SurfaceSubPlugin : public SubPlugin {
 public:
     SurfaceSubPlugin(NPP inst) : SubPlugin(inst) { m_context = NULL; }
-    virtual ~SurfaceSubPlugin() {}
+    virtual ~SurfaceSubPlugin();
     virtual jobject getSurface() = 0;
     virtual bool supportsDrawingModel(ANPDrawingModel);