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diff --git a/native_client_sdk/src/examples/tumbler/tumbler.h b/native_client_sdk/src/examples/tumbler/tumbler.h
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+// Copyright (c) 2011 The Native Client Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef EXAMPLES_TUMBLER_TUMBLER_H_
+#define EXAMPLES_TUMBLER_TUMBLER_H_
+
+#include <pthread.h>
+#include <map>
+#include <vector>
+
+#include "examples/tumbler/cube.h"
+#include "examples/tumbler/opengl_context.h"
+#include "examples/tumbler/opengl_context_ptrs.h"
+#include "examples/tumbler/scripting_bridge.h"
+#include "ppapi/cpp/instance.h"
+
+namespace tumbler {
+
+class Tumbler : public pp::Instance {
+ public:
+  explicit Tumbler(PP_Instance instance);
+
+  // The dtor makes the 3D context current before deleting the cube view, then
+  // destroys the 3D context both in the module and in the browser.
+  virtual ~Tumbler();
+
+  // Called by the browser when the NaCl module is loaded and all ready to go.
+  virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]);
+
+  // Called whenever the in-browser window changes size.
+  virtual void DidChangeView(const pp::Rect& position, const pp::Rect& clip);
+
+  // Called by the browser to handle the postMessage() call in Javascript.
+  virtual void HandleMessage(const pp::Var& message);
+
+  // Bind and publish the module's methods to JavaScript.
+  void InitializeMethods(ScriptingBridge* bridge);
+
+  // Set the camera orientation to the quaternion in |args[0]|.  |args| must
+  // have length at least 1; the first element is expeted to be an Array
+  // object containing 4 floating point number elements (the quaternion).
+  // This method is bound to the JavaScript "setCameraOrientation" method and
+  // is called like this:
+  //     module.setCameraOrientation([0.0, 1.0, 0.0, 0.0]);
+  void SetCameraOrientation(
+    const tumbler::ScriptingBridge& bridge,
+    const tumbler::MethodParameter& parameters);
+
+  // Called to draw the contents of the module's browser area.
+  void DrawSelf();
+
+ private:
+  // Browser connectivity and scripting support.
+  ScriptingBridge scripting_bridge_;
+
+  SharedOpenGLContext opengl_context_;
+  // Wouldn't it be awesome if we had boost::scoped_ptr<>?
+  Cube* cube_;
+};
+
+}  // namespace tumbler
+
+#endif  // EXAMPLES_TUMBLER_TUMBLER_H_