Change ui cursor identifiers to an enum class.

ui/base/cursor/cursor_loader_win.h

 // Copyright (c) 2012 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_BASE_CURSOR_CURSOR_LOADER_WIN_H_
 #define UI_BASE_CURSOR_CURSOR_LOADER_WIN_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/base/cursor/cursor_loader.h"
 
 namespace ui {
 
 class UI_BASE_EXPORT CursorLoaderWin : public CursorLoader {
  public:
   CursorLoaderWin();
   ~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;
   void UnloadAll() override;
   void SetPlatformCursor(gfx::NativeCursor* cursor) override;
 
   // Used to pass the cursor resource module name to the cursor loader. This is
   // typically used to load non system cursors.
   static void SetCursorResourceModule(const base::string16& module_name);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CursorLoaderWin);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CURSOR_CURSOR_LOADER_WIN_H_