Refactor ozone drm cursor code for mojo

ui/events/ozone/evdev/cursor_delegate_evdev.h

Index: ui/events/ozone/evdev/cursor_delegate_evdev.h
diff --git a/ui/events/ozone/evdev/cursor_delegate_evdev.h b/ui/events/ozone/evdev/cursor_delegate_evdev.h
index bba23d19be5f3a93e3f6d00b315079ca8a434b40..6a6820fe74abd9d921dbf4733375807ccc7efdc8 100644
--- a/ui/events/ozone/evdev/cursor_delegate_evdev.h
+++ b/ui/events/ozone/evdev/cursor_delegate_evdev.h
@@ -20,20 +20,25 @@ class EVENTS_OZONE_EVDEV_EXPORT CursorDelegateEvdev {
  public:
   virtual ~CursorDelegateEvdev() {}
 
-  // Move the cursor.
+  // Move the cursor from the Evdev thread.
   virtual void MoveCursor(const gfx::Vector2dF& delta) = 0;
+  // Move the cursor from the UI thread only.
   virtual void MoveCursorTo(gfx::AcceleratedWidget widget,
                             const gfx::PointF& location) = 0;
+  // Move the cursor from the UI thread only.
   virtual void MoveCursorTo(const gfx::PointF& location) = 0;
 
-  // Location in screen.
+  // Location in screen. Either thread, IPC-free.
   virtual gfx::PointF GetLocation() = 0;
 
-  // Cursor visibility.
+  // Cursor visibility. Either thread, IPC-free.
   virtual bool IsCursorVisible() = 0;
 
-  // The bounds that the cursor is confined to.
+  // The bounds that the cursor is confined to. Either thread, IPC-free.
   virtual gfx::Rect GetCursorConfinedBounds() = 0;
+
+  // Any necessary initialization from Evdev thread.
+  virtual void InitializeOnEvdev() = 0;
 };
 
 }  // namespace ui