SkyShell should be able to draw a green square with GL

sky/shell/shell.h

+// Copyright 2015 The Chromium 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 SKY_SHELL_SHELL_H_
+#define SKY_SHELL_SHELL_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "sky/shell/gpu_driver.h"
+#include "sky/shell/sky_view.h"
+
+namespace base {
+class Thread;
+class SingleThreadTaskRunner;
+}
+
+namespace sky {
+namespace shell {
+class SkyView;
+
+class Shell : public SkyView::Delegate {
+ public:
+  explicit Shell(scoped_refptr<base::SingleThreadTaskRunner> java_task_runner);
+  ~Shell();
+
+  void Init();
+
+ private:
+  void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) override;
+  void OnDestroyed() override;
+
+  scoped_refptr<base::SingleThreadTaskRunner> java_task_runner_;
+  scoped_ptr<base::Thread> gpu_thread_;
+
+  scoped_ptr<SkyView> view_;
+  scoped_ptr<GPUDriver> gpu_driver_;
+
+  DISALLOW_COPY_AND_ASSIGN(Shell);
+};
+
+}  // namespace shell
+}  // namespace sky
+
+#endif  // SKY_SHELL_SHELL_H_