Change ui cursor identifiers to an enum class.

ui/ozone/platform/x11/x11_cursor_factory_ozone.h

Index: ui/ozone/platform/x11/x11_cursor_factory_ozone.h
diff --git a/ui/ozone/platform/x11/x11_cursor_factory_ozone.h b/ui/ozone/platform/x11/x11_cursor_factory_ozone.h
index a186a8211e42cb770dd8af6e1ae0fce539183b19..7b7ac6425051a3cc7a97cdea3c5043dd14ddea4f 100644
--- a/ui/ozone/platform/x11/x11_cursor_factory_ozone.h
+++ b/ui/ozone/platform/x11/x11_cursor_factory_ozone.h
@@ -7,8 +7,8 @@
 
 #include <X11/X.h>
 
+#include <map>
 #include <memory>
-#include <unordered_map>
 #include <vector>
 
 #include "base/macros.h"
@@ -25,7 +25,7 @@ class X11CursorFactoryOzone : public CursorFactoryOzone {
   ~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;
@@ -38,13 +38,13 @@ class X11CursorFactoryOzone : public CursorFactoryOzone {
 
  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);
 };