Move xfa/include/fwl/{theme,lightwidget} to xfa/fwl

This CL moves and splits the remaining FWL files out of xfa/include and into
their proper locations.

Review URL: https://codereview.chromium.org/1834323003
diff --git a/BUILD.gn b/BUILD.gn
index b97d4e5..bc680b7 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1079,33 +1079,65 @@
       "xfa/fwl/core/ifwl_widgetmgr.h",
       "xfa/fwl/core/ifwl_widgetmgrdelegate.h",
       "xfa/fwl/core/include/ifwl_adaptertimermgr.h",
-      "xfa/fwl/lightwidget/app.cpp",
-      "xfa/fwl/lightwidget/barcode.cpp",
-      "xfa/fwl/lightwidget/caret.cpp",
-      "xfa/fwl/lightwidget/checkbox.cpp",
-      "xfa/fwl/lightwidget/combobox.cpp",
-      "xfa/fwl/lightwidget/datetimepicker.cpp",
-      "xfa/fwl/lightwidget/edit.cpp",
-      "xfa/fwl/lightwidget/listbox.cpp",
-      "xfa/fwl/lightwidget/picturebox.cpp",
-      "xfa/fwl/lightwidget/pushbutton.cpp",
-      "xfa/fwl/lightwidget/scrollbar.cpp",
-      "xfa/fwl/lightwidget/theme.cpp",
-      "xfa/fwl/lightwidget/tooltipctrl.cpp",
-      "xfa/fwl/lightwidget/widget.cpp",
-      "xfa/fwl/theme/barcodetp.cpp",
-      "xfa/fwl/theme/carettp.cpp",
-      "xfa/fwl/theme/checkboxtp.cpp",
-      "xfa/fwl/theme/comboboxtp.cpp",
-      "xfa/fwl/theme/datetimepickertp.cpp",
-      "xfa/fwl/theme/edittp.cpp",
-      "xfa/fwl/theme/formtp.cpp",
-      "xfa/fwl/theme/listboxtp.cpp",
-      "xfa/fwl/theme/monthcalendartp.cpp",
-      "xfa/fwl/theme/pictureboxtp.cpp",
-      "xfa/fwl/theme/pushbuttontp.cpp",
-      "xfa/fwl/theme/scrollbartp.cpp",
-      "xfa/fwl/theme/widgettp.cpp",
+      "xfa/fwl/lightwidget/cfwl_app.cpp",
+      "xfa/fwl/lightwidget/cfwl_app.h",
+      "xfa/fwl/lightwidget/cfwl_barcode.cpp",
+      "xfa/fwl/lightwidget/cfwl_barcode.h",
+      "xfa/fwl/lightwidget/cfwl_caret.cpp",
+      "xfa/fwl/lightwidget/cfwl_caret.h",
+      "xfa/fwl/lightwidget/cfwl_checkbox.cpp",
+      "xfa/fwl/lightwidget/cfwl_checkbox.h",
+      "xfa/fwl/lightwidget/cfwl_combobox.cpp",
+      "xfa/fwl/lightwidget/cfwl_combobox.h",
+      "xfa/fwl/lightwidget/cfwl_datetimepicker.cpp",
+      "xfa/fwl/lightwidget/cfwl_datetimepicker.h",
+      "xfa/fwl/lightwidget/cfwl_edit.cpp",
+      "xfa/fwl/lightwidget/cfwl_edit.h",
+      "xfa/fwl/lightwidget/cfwl_listbox.cpp",
+      "xfa/fwl/lightwidget/cfwl_listbox.h",
+      "xfa/fwl/lightwidget/cfwl_picturebox.cpp",
+      "xfa/fwl/lightwidget/cfwl_picturebox.h",
+      "xfa/fwl/lightwidget/cfwl_pushbutton.cpp",
+      "xfa/fwl/lightwidget/cfwl_pushbutton.h",
+      "xfa/fwl/lightwidget/cfwl_scrollbar.cpp",
+      "xfa/fwl/lightwidget/cfwl_scrollbar.h",
+      "xfa/fwl/lightwidget/cfwl_theme.cpp",
+      "xfa/fwl/lightwidget/cfwl_theme.h",
+      "xfa/fwl/lightwidget/cfwl_tooltip.cpp",
+      "xfa/fwl/lightwidget/cfwl_tooltip.h",
+      "xfa/fwl/lightwidget/cfwl_widget.cpp",
+      "xfa/fwl/lightwidget/cfwl_widget.h",
+      "xfa/fwl/lightwidget/cfwl_widgetdelegate.cpp",
+      "xfa/fwl/lightwidget/cfwl_widgetdelegate.h",
+      "xfa/fwl/lightwidget/cfwl_widgetproperities.cpp",
+      "xfa/fwl/lightwidget/cfwl_widgetproperties.h",
+      "xfa/fwl/theme/cfwl_barcodetp.cpp",
+      "xfa/fwl/theme/cfwl_barcodetp.h",
+      "xfa/fwl/theme/cfwl_carettp.cpp",
+      "xfa/fwl/theme/cfwl_carettp.h",
+      "xfa/fwl/theme/cfwl_checkboxtp.cpp",
+      "xfa/fwl/theme/cfwl_checkboxtp.h",
+      "xfa/fwl/theme/cfwl_comboboxtp.cpp",
+      "xfa/fwl/theme/cfwl_comboboxtp.h",
+      "xfa/fwl/theme/cfwl_datetimepickedtp.cpp",
+      "xfa/fwl/theme/cfwl_datetimepickertp.h",
+      "xfa/fwl/theme/cfwl_edittp.cpp",
+      "xfa/fwl/theme/cfwl_edittp.h",
+      "xfa/fwl/theme/cfwl_formtp.cpp",
+      "xfa/fwl/theme/cfwl_formtp.h",
+      "xfa/fwl/theme/cfwl_listboxtp.cpp",
+      "xfa/fwl/theme/cfwl_listboxtp.h",
+      "xfa/fwl/theme/cfwl_monthcalendartp.cpp",
+      "xfa/fwl/theme/cfwl_monthcalendartp.h",
+      "xfa/fwl/theme/cfwl_pictureboxtp.cpp",
+      "xfa/fwl/theme/cfwl_pictureboxtp.h",
+      "xfa/fwl/theme/cfwl_pushbuttontp.cpp",
+      "xfa/fwl/theme/cfwl_pushbuttontp.h",
+      "xfa/fwl/theme/cfwl_scrollbartp.cpp",
+      "xfa/fwl/theme/cfwl_scrollbartp.h",
+      "xfa/fwl/theme/cfwl_utils.h",
+      "xfa/fwl/theme/cfwl_widgettp.cpp",
+      "xfa/fwl/theme/cfwl_widgettp.h",
       "xfa/fxbarcode/BC_Binarizer.cpp",
       "xfa/fxbarcode/BC_Binarizer.h",
       "xfa/fxbarcode/BC_BinaryBitmap.cpp",
@@ -1509,34 +1541,6 @@
       "xfa/fxgraphics/cfx_shading.h",
       "xfa/fxgraphics/include/cfx_graphics.h",
       "xfa/fxjse/include/fxjse.h",
-      "xfa/include/fwl/lightwidget/app.h",
-      "xfa/include/fwl/lightwidget/barcode.h",
-      "xfa/include/fwl/lightwidget/caret.h",
-      "xfa/include/fwl/lightwidget/checkbox.h",
-      "xfa/include/fwl/lightwidget/combobox.h",
-      "xfa/include/fwl/lightwidget/datetimepicker.h",
-      "xfa/include/fwl/lightwidget/edit.h",
-      "xfa/include/fwl/lightwidget/listbox.h",
-      "xfa/include/fwl/lightwidget/picturebox.h",
-      "xfa/include/fwl/lightwidget/pushbutton.h",
-      "xfa/include/fwl/lightwidget/scrollbar.h",
-      "xfa/include/fwl/lightwidget/theme.h",
-      "xfa/include/fwl/lightwidget/tooltipctrl.h",
-      "xfa/include/fwl/lightwidget/widget.h",
-      "xfa/include/fwl/theme/barcodetp.h",
-      "xfa/include/fwl/theme/carettp.h",
-      "xfa/include/fwl/theme/checkboxtp.h",
-      "xfa/include/fwl/theme/comboboxtp.h",
-      "xfa/include/fwl/theme/datetimepickertp.h",
-      "xfa/include/fwl/theme/edittp.h",
-      "xfa/include/fwl/theme/formtp.h",
-      "xfa/include/fwl/theme/listboxtp.h",
-      "xfa/include/fwl/theme/monthcalendartp.h",
-      "xfa/include/fwl/theme/pictureboxtp.h",
-      "xfa/include/fwl/theme/pushbuttontp.h",
-      "xfa/include/fwl/theme/scrollbartp.h",
-      "xfa/include/fwl/theme/utils.h",
-      "xfa/include/fwl/theme/widgettp.h",
       "xfa/include/fxfa/fxfa.h",
       "xfa/include/fxfa/fxfa_basic.h",
       "xfa/include/fxfa/fxfa_objectacc.h",