Switch DRM platform to using a separate thread

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

Index: ui/ozone/platform/drm/gpu/drm_thread_proxy.h
diff --git a/ui/ozone/platform/drm/gpu/drm_thread_proxy.h b/ui/ozone/platform/drm/gpu/drm_thread_proxy.h
new file mode 100644
index 0000000000000000000000000000000000000000..1015c9732949d8e4e935a30100f7b37608fcd76d
--- /dev/null
+++ b/ui/ozone/platform/drm/gpu/drm_thread_proxy.h
@@ -0,0 +1,60 @@
+// 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_THREAD_PROXY_H_
+#define UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_PROXY_H_
+
+namespace ui {
+
+class DrmThreadProxy {
+ public:
+  DrmThreadProxy();
+
+  void OnCreateWindow(gfx::AcceleratedWidget widget);
+  void OnDestroyWindow(gfx::AcceleratedWidget widget);
+  void OnWindowBoundsChanged(gfx::AcceleratedWidget widget,
+                             const gfx::Rect& bounds);
+  void OnCursorSet(gfx::AcceleratedWidget widget,
+                   const std::vector<SkBitmap>& bitmaps,
+                   const gfx::Point& location,
+                   int frame_delay_ms);
+  void OnCursorMove(gfx::AcceleratedWidget widget, const gfx::Point& location);
+  void OnCheckOverlayCapabilities(
+      gfx::AcceleratedWidget widget,
+      const std::vector<OverlayCheck_Params>& overlays,
+      const base::Callback<void(gfx::AcceleratedWidget, bool)>& callback);
+  void OnRefreshNativeDisplays(
+      const base::Callback<void(const std::vector<DisplaySnapshot_Params>&)>&
+          callback);
+  void OnConfigureNativeDisplay(
+      int64_t id,
+      const DisplayMode_Params& mode,
+      const gfx::Point& origin,
+      const base::Callback<void(int64_t, bool)>& callback);
+  void OnDisableNativeDisplay(
+      int64_t id,
+      const base::Callback<void(int64_t, bool)>& callback);
+  void OnTakeDisplayControl(const base::Callback<void(bool)>& callback);
+  void OnRelinquishDisplayControl(const base::Callback<void(bool)>& callback);
+  void OnAddGraphicsDevice(const base::FilePath& path,
+                           const base::FileDescriptor& fd);
+  void OnRemoveGraphicsDevice(const base::FilePath& path);
+  void OnGetHDCPState(
+      int64_t display_id,
+      const base::Callback<void(int64_t, bool, HDCPState>& callback);
+  void OnSetHDCPState(
+      int64_t display_id,
+      HDCPState state,
+      const base::Callback<void(int64_t, bool)>& callback);
+  void OnSetGammaRamp(int64_t id, const std::vector<GammaRampRGBEntry>& lut);
+
+ private:
+  DrmThread drm_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(DrmThreadProxy);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_PROXY_H_