ozone: Add UiThreadGpu for applications that do UI thread GL

ui/ozone/public/ui_thread_gpu.h

+// Copyright 2014 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 UI_OZONE_PUBLIC_UI_THREAD_GPU_H_
+#define UI_OZONE_PUBLIC_UI_THREAD_GPU_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/ozone/ozone_export.h"
+
+namespace IPC {
+class Sender;
+}
+
+namespace ui {
+
+class UiThreadGpuForwardingSender;
+
+// Helper class for applications that do GL on the UI thead.
+//
+// This sets up message forwarding between the "gpu" and "ui" threads,
+// for applications in which they are both the same thread.
+class OZONE_EXPORT UiThreadGpu {
+ public:
+  UiThreadGpu();
+  virtual ~UiThreadGpu();
+
+  // Start processing gpu messages.
+  bool Initialize();
+
+ private:
+  scoped_ptr<UiThreadGpuForwardingSender> ui_sender_;
+  scoped_ptr<UiThreadGpuForwardingSender> gpu_sender_;
+
+  DISALLOW_COPY_AND_ASSIGN(UiThreadGpu);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PUBLIC_UI_THREAD_GPU_H_