More define cleanup.

xfa/fwl/core/fwl_noteimp.h

Index: xfa/fwl/core/fwl_noteimp.h
diff --git a/xfa/fwl/core/fwl_noteimp.h b/xfa/fwl/core/fwl_noteimp.h
index 8607a334f11a5190e44dd989bc5c80e811993541..723d2e5742e0a96d34f259db8742bc3b5e9ad52c 100644
--- a/xfa/fwl/core/fwl_noteimp.h
+++ b/xfa/fwl/core/fwl_noteimp.h
@@ -13,13 +13,15 @@
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxgraphics/include/cfx_graphics.h"
 
-#define FWL_KEYFLAG_Ctrl (1 << 0)
-#define FWL_KEYFLAG_Alt (1 << 1)
-#define FWL_KEYFLAG_Shift (1 << 2)
-#define FWL_KEYFLAG_Command (1 << 3)
-#define FWL_KEYFLAG_LButton (1 << 4)
-#define FWL_KEYFLAG_RButton (1 << 5)
-#define FWL_KEYFLAG_MButton (1 << 6)
+enum FWL_KeyFlag {
+  FWL_KEYFLAG_Ctrl = 1 << 0,
+  FWL_KEYFLAG_Alt = 1 << 1,
+  FWL_KEYFLAG_Shift = 1 << 2,
+  FWL_KEYFLAG_Command = 1 << 3,
+  FWL_KEYFLAG_LButton = 1 << 4,
+  FWL_KEYFLAG_RButton = 1 << 5,
+  FWL_KEYFLAG_MButton = 1 << 6
+};
 
 class CFWL_CoreToolTipDP;
 class CFWL_MsgActivate;