Change ui cursor identifiers to an enum class.

ui/base/cursor/cursors_aura.h

Index: ui/base/cursor/cursors_aura.h
diff --git a/ui/base/cursor/cursors_aura.h b/ui/base/cursor/cursors_aura.h
index e8eae0ab2deeaae6aa22e9df7bf1695e70886b35..6ce2da62e32b7be905f04b6961f558ca93619c3a 100644
--- a/ui/base/cursor/cursors_aura.h
+++ b/ui/base/cursor/cursors_aura.h
@@ -19,18 +19,18 @@ namespace ui {
 const int kAnimatedCursorFrameDelayMs = 25;
 
 // Returns data about |id|, where id is a cursor constant like
-// ui::kCursorHelp. The IDR will be placed in |resource_id| and the hotspots
-// for the different DPIs will be placed in |hot_1x| and |hot_2x|. Returns
-// false if |id| is invalid.
+// ui::CursorType::kHelp. The IDR will be placed in |resource_id| and the
+// hotspots for the different DPIs will be placed in |hot_1x| and |hot_2x|.
+// Returns false if |id| is invalid.
 bool UI_BASE_EXPORT GetCursorDataFor(CursorSetType cursor_set_id,
-                                     int id,
+                                     CursorType id,
                                      float scale_factor,
                                      int* resource_id,
                                      gfx::Point* point);
 
 // Like above, but for animated cursors.
 bool UI_BASE_EXPORT GetAnimatedCursorDataFor(CursorSetType cursor_set_id,
-                                             int id,
+                                             CursorType id,
                                              float scale_factor,
                                              int* resource_id,
                                              gfx::Point* point);