Switch DRM platform to using a separate thread

ui/ozone/platform/drm/gpu/drm_window_proxy.h

Index: ui/ozone/platform/drm/gpu/drm_window_proxy.h
diff --git a/ui/ozone/platform/drm/gpu/drm_window_proxy.h b/ui/ozone/platform/drm/gpu/drm_window_proxy.h
new file mode 100644
index 0000000000000000000000000000000000000000..87a61b0a4a24bd3626208099194c751d5273b5fa
--- /dev/null
+++ b/ui/ozone/platform/drm/gpu/drm_window_proxy.h
@@ -0,0 +1,40 @@
+// 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 UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_PROXY_H_
+#define UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_PROXY_H_
+
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/vsync_provider.h"
+#include "ui/ozone/public/surface_ozone_egl.h"
+
+namespace ui {
+
+class DrmThread;
+struct OverlayPlane;
+
+class DrmWindowProxy {
+ public:
+  DrmWindowProxy(gfx::AcceleratedWidget widget, DrmThread* drm_thread);
+  ~DrmWindowProxy();
+
+  gfx::AcceleratedWidget widget() const { return widget_; }
+
+  void SchedulePageFlip(const std::vector<OverlayPlane>& planes,
+                        const SwapCompletionCallback& callback);
+
+  void GetVSyncParameters(
+      const gfx::VSyncProvider::UpdateVSyncCallback& callback);
+
+ private:
+  gfx::AcceleratedWidget widget_;
+
+  DrmThread* drm_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(DrmWindowProxy);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_PROXY_H_