Merge the CFWL_*Imp classes into the IFWL_* classes.

xfa/fxfa/app/xfa_fwltheme.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fxfa/app/xfa_fwltheme.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fgas/crt/fgas_codepage.h"
 #include "xfa/fgas/font/fgas_gefont.h"
-#include "xfa/fwl/basewidget/ifwl_barcode.h"
-#include "xfa/fwl/basewidget/ifwl_caret.h"
-#include "xfa/fwl/basewidget/ifwl_checkbox.h"
-#include "xfa/fwl/basewidget/ifwl_combobox.h"
-#include "xfa/fwl/basewidget/ifwl_datetimepicker.h"
-#include "xfa/fwl/basewidget/ifwl_edit.h"
-#include "xfa/fwl/basewidget/ifwl_listbox.h"
-#include "xfa/fwl/basewidget/ifwl_monthcalendar.h"
-#include "xfa/fwl/basewidget/ifwl_picturebox.h"
-#include "xfa/fwl/basewidget/ifwl_pushbutton.h"
-#include "xfa/fwl/basewidget/ifwl_scrollbar.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/cfwl_themetext.h"
+#include "xfa/fwl/core/ifwl_barcode.h"
+#include "xfa/fwl/core/ifwl_caret.h"
+#include "xfa/fwl/core/ifwl_checkbox.h"
+#include "xfa/fwl/core/ifwl_combobox.h"
+#include "xfa/fwl/core/ifwl_datetimepicker.h"
+#include "xfa/fwl/core/ifwl_edit.h"
+#include "xfa/fwl/core/ifwl_listbox.h"
+#include "xfa/fwl/core/ifwl_monthcalendar.h"
+#include "xfa/fwl/core/ifwl_picturebox.h"
+#include "xfa/fwl/core/ifwl_pushbutton.h"
+#include "xfa/fwl/core/ifwl_scrollbar.h"
 #include "xfa/fxfa/xfa_ffapp.h"
 #include "xfa/fxfa/xfa_ffwidget.h"
 #include "xfa/fxgraphics/cfx_color.h"
 
 namespace {
 
 const FX_WCHAR* const g_FWLTheme_CalFonts[] = {
     L"Arial", L"Courier New", L"DejaVu Sans",
 };
 
@@ skipping 348 matching lines @@
     case FWL_Type::PushButton:
       return m_pPushButtonTP.get();
     case FWL_Type::Caret:
       return m_pCaretTP.get();
     case FWL_Type::Barcode:
       return m_pBarcodeTP.get();
     default:
       return nullptr;
   }
 }