Move window type mask up with masked flags

Move code to make clear what is being masked.

Review-Url: https://codereview.chromium.org/2573163002

xfa/fwl/fwl_widgetdef.h

diff --git a/xfa/fwl/fwl_widgetdef.h b/xfa/fwl/fwl_widgetdef.h
index 04e1ec0..a85ba15 100644
--- a/xfa/fwl/fwl_widgetdef.h
+++ b/xfa/fwl/fwl_widgetdef.h
@@ -10,11 +10,11 @@
 #define FWL_WGTSTYLE_OverLapper 0
 #define FWL_WGTSTYLE_Popup (1L << 0)
 #define FWL_WGTSTYLE_Child (2L << 0)
+#define FWL_WGTSTYLE_WindowTypeMask (3L << 0)
 #define FWL_WGTSTYLE_Border (1L << 2)
 #define FWL_WGTSTYLE_VScroll (1L << 11)
 #define FWL_WGTSTYLE_Group (1L << 22)
 #define FWL_WGTSTYLE_NoBackground (1L << 28)
-#define FWL_WGTSTYLE_WindowTypeMask (3L << 0)
 
 #define FWL_WGTSTATE_Disabled (1L << 2)
 #define FWL_WGTSTATE_Focused (1L << 4)