Change ui cursor identifiers to an enum class.

ui/base/cursor/cursor_loader_win.h

Index: ui/base/cursor/cursor_loader_win.h
diff --git a/ui/base/cursor/cursor_loader_win.h b/ui/base/cursor/cursor_loader_win.h
index 270198b283aabf7896f75be92afa5b5222ffae45..ad6835316ca45369aefa7ddcb39a2013695ed5d6 100644
--- a/ui/base/cursor/cursor_loader_win.h
+++ b/ui/base/cursor/cursor_loader_win.h
@@ -17,8 +17,10 @@ class UI_BASE_EXPORT CursorLoaderWin : public CursorLoader {
   ~CursorLoaderWin() override;
 
   // Overridden from CursorLoader:
-  void LoadImageCursor(int id, int resource_id, const gfx::Point& hot) override;
-  void LoadAnimatedCursor(int id,
+  void LoadImageCursor(CursorType id,
+                       int resource_id,
+                       const gfx::Point& hot) override;
+  void LoadAnimatedCursor(CursorType id,
                           int resource_id,
                           const gfx::Point& hot,
                           int frame_delay_ms) override;