Change ui cursor identifiers to an enum class.

ash/mus/move_event_handler.cc

Index: ash/mus/move_event_handler.cc
diff --git a/ash/mus/move_event_handler.cc b/ash/mus/move_event_handler.cc
index b0ba9cc873b81f9720953569eb7c9508a8ba1dbd..6c89fa9f0554cc817484b9f4797a1d5ce81442d3 100644
--- a/ash/mus/move_event_handler.cc
+++ b/ash/mus/move_event_handler.cc
@@ -31,23 +31,23 @@ namespace {
 ui::mojom::CursorType CursorForWindowComponent(int window_component) {
   switch (window_component) {
     case HTBOTTOM:
-      return ui::mojom::CursorType::SOUTH_RESIZE;
+      return ui::mojom::CursorType::kSouthResize;
     case HTBOTTOMLEFT:
-      return ui::mojom::CursorType::SOUTH_WEST_RESIZE;
+      return ui::mojom::CursorType::kSouthWestResize;
     case HTBOTTOMRIGHT:
-      return ui::mojom::CursorType::SOUTH_EAST_RESIZE;
+      return ui::mojom::CursorType::kSouthEastResize;
     case HTLEFT:
-      return ui::mojom::CursorType::WEST_RESIZE;
+      return ui::mojom::CursorType::kWestResize;
     case HTRIGHT:
-      return ui::mojom::CursorType::EAST_RESIZE;
+      return ui::mojom::CursorType::kEastResize;
     case HTTOP:
-      return ui::mojom::CursorType::NORTH_RESIZE;
+      return ui::mojom::CursorType::kNorthResize;
     case HTTOPLEFT:
-      return ui::mojom::CursorType::NORTH_WEST_RESIZE;
+      return ui::mojom::CursorType::kNorthWestResize;
     case HTTOPRIGHT:
-      return ui::mojom::CursorType::NORTH_EAST_RESIZE;
+      return ui::mojom::CursorType::kNorthEastResize;
     default:
-      return ui::mojom::CursorType::CURSOR_NULL;
+      return ui::mojom::CursorType::kNull;
   }
 }