Use mojo for cursor control in ozone drm

ui/ozone/platform/drm/cursor_proxy_mojo.h

+// Copyright 2016 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_CURSOR_PROXY_MOJO_H_
+#define UI_OZONE_PLATFORM_DRM_CURSOR_PROXY_MOJO_H_
+
+#include "ui/gfx/native_widget_types.h"
+#include "ui/ozone/platform/drm/gpu/inter_thread_messaging_proxy.h"
+#include "ui/ozone/platform/drm/host/drm_cursor.h"
+#include "ui/ozone/public/interfaces/device_cursor.mojom.h"
+
+namespace shell {
+class Connector;
+}
+
+namespace ui {
+
+// Ozone requires a IPC from the browser (or mus-ws) process to the gpu (or
+// mus-gpu) process to control the mouse pointer. This class provides mouse
+// pointer control via Mojo-style IPC. This code runs only in the mus-ws (i.e.
+// it's the client) and sends mouse pointer control messages to a less
+// priviledged process.
+class CursorProxyMojo : public DrmCursorProxy {
+ public:
+  explicit CursorProxyMojo(shell::Connector* connector);
+  ~CursorProxyMojo() override;
+
+ private:
+  // DrmCursorProxy.
+  void CursorSet(gfx::AcceleratedWidget window,
+                 const std::vector<SkBitmap>& bitmaps,
+                 const gfx::Point& point,
+                 int frame_delay_ms) override;
+  void Move(gfx::AcceleratedWidget window, const gfx::Point& point) override;
+  void InitializeOnEvdev() override;
+
+  std::unique_ptr<shell::Connector> connector_;
+
+  // Mojo implementation of the DrmCursorProxy.
+  ui::ozone::mojom::DeviceCursorPtr main_cursor_ptr_;
+  ui::ozone::mojom::DeviceCursorPtr evdev_cursor_ptr_;
+
+  base::PlatformThreadRef evdev_ref_;
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_CURSOR_PROXY_MOJO_H_