Refactor ozone drm cursor code for mojo

ui/ozone/platform/drm/host/drm_cursor.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 UI_OZONE_PLATFORM_DRM_HOST_DRM_CURSOR_H_
 #define UI_OZONE_PLATFORM_DRM_HOST_DRM_CURSOR_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 14 matching lines @@
  public:
   virtual ~DrmCursorProxy() {}
 
   // Sets the cursor |bitmaps| on |window| at |point| with |frame_delay_ms|.
   virtual void CursorSet(gfx::AcceleratedWidget window,
                          const std::vector<SkBitmap>& bitmaps,
                          const gfx::Point& point,
                          int frame_delay_ms) = 0;
   // Moves the cursor in |window| to |point|
   virtual void Move(gfx::AcceleratedWidget window, const gfx::Point& point) = 0;
+
+  // Initialize EvdevThread-specific state.
+  virtual void InitializeOnEvdev() = 0;
 };
 
 // DrmCursor manages all cursor state and semantics.
 class DrmCursor : public CursorDelegateEvdev {
  public:
   explicit DrmCursor(DrmWindowHostManager* window_manager);
   ~DrmCursor() override;
 
   // Sets or resets the DrmProxy |proxy|. If |proxy| is set, the DrmCursor uses
   // it to communicate to the GPU process or thread.
@@ skipping 15 matching lines @@
                           const gfx::Rect& new_confined_bounds);
 
   // CursorDelegateEvdev:
   void MoveCursorTo(gfx::AcceleratedWidget window,
                     const gfx::PointF& location) override;
   void MoveCursorTo(const gfx::PointF& screen_location) override;
   void MoveCursor(const gfx::Vector2dF& delta) override;
   bool IsCursorVisible() override;
   gfx::PointF GetLocation() override;
   gfx::Rect GetCursorConfinedBounds() override;
+  void InitializeOnEvdev() override;
 
  private:
   void SetCursorLocationLocked(const gfx::PointF& location);
   void SendCursorShowLocked();
   void SendCursorHideLocked();
   void SendCursorMoveLocked();
 
   // Lock-testing helpers.
   void CursorSetLockTested(gfx::AcceleratedWidget window,
                            const std::vector<SkBitmap>& bitmaps,
                            const gfx::Point& point,
                            int frame_delay_ms);
   void MoveLockTested(gfx::AcceleratedWidget window, const gfx::Point& point);
 
   // The mutex synchronizing this object.
   base::Lock lock_;
 
   // Enforce our threading constraints.
   base::ThreadChecker thread_checker_;
+  base::ThreadChecker evdev_thread_checker_;
 
   // The location of the bitmap (the cursor location is the hotspot location).
   gfx::Point GetBitmapLocationLocked();
 
   // The current cursor bitmap (immutable).
   scoped_refptr<BitmapCursorOzone> bitmap_;
 
   // The window under the cursor.
   gfx::AcceleratedWidget window_;
 
   // The location of the cursor within the window.
   gfx::PointF location_;
 
   // The bounds of the display under the cursor.
   gfx::Rect display_bounds_in_screen_;
 
   // The bounds that the cursor is confined to in |window|.
   gfx::Rect confined_bounds_;
 
   DrmWindowHostManager* window_manager_;  // Not owned.
 
   std::unique_ptr<DrmCursorProxy> proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmCursor);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_HOST_DRM_CURSOR_H_