Change ui cursor identifiers to an enum class.

ui/ozone/platform/x11/x11_cursor_factory_ozone.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_X11_X11_CURSOR_FACTORY_OZONE_H_
 #define UI_OZONE_PLATFORM_X11_X11_CURSOR_FACTORY_OZONE_H_
 
 #include <X11/X.h>
 
+#include <map>
 #include <memory>
-#include <unordered_map>
 #include <vector>
 
 #include "base/macros.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/ozone/public/cursor_factory_ozone.h"
 #include "ui/platform_window/x11/x11_cursor_ozone.h"
 
 namespace ui {
 
 // CursorFactoryOzone implementation for X11 cursors.
 class X11CursorFactoryOzone : public CursorFactoryOzone {
  public:
   X11CursorFactoryOzone();
   ~X11CursorFactoryOzone() override;
 
   // CursorFactoryOzone:
-  PlatformCursor GetDefaultCursor(int type) override;
+  PlatformCursor GetDefaultCursor(CursorType type) override;
   PlatformCursor CreateImageCursor(const SkBitmap& bitmap,
                                    const gfx::Point& hotspot,
                                    float bitmap_dpi) override;
   PlatformCursor CreateAnimatedCursor(const std::vector<SkBitmap>& bitmaps,
                                       const gfx::Point& hotspot,
                                       int frame_delay_ms,
                                       float bitmap_dpi) override;
   void RefImageCursor(PlatformCursor cursor) override;
   void UnrefImageCursor(PlatformCursor cursor) override;
 
  private:
   // Loads/caches default cursor or returns cached version.
-  scoped_refptr<X11CursorOzone> GetDefaultCursorInternal(int type);
+  scoped_refptr<X11CursorOzone> GetDefaultCursorInternal(CursorType type);
 
   // Holds a single instance of the invisible cursor. X11 has no way to hide
   // the cursor so an invisible cursor mimics that.
   scoped_refptr<X11CursorOzone> invisible_cursor_;
 
-  std::unordered_map<int, scoped_refptr<X11CursorOzone>> default_cursors_;
+  std::map<CursorType, scoped_refptr<X11CursorOzone>> default_cursors_;
 
   DISALLOW_COPY_AND_ASSIGN(X11CursorFactoryOzone);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_X11_X11_CURSOR_FACTORY_OZONE_H_