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

xfa/fwl/theme/cfwl_checkboxtp.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/fwl/theme/cfwl_checkboxtp.h"
 
 #include "core/fxge/cfx_pathdata.h"
 #include "xfa/fde/tto/fde_textout.h"
-#include "xfa/fwl/basewidget/ifwl_checkbox.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/cfwl_themetext.h"
+#include "xfa/fwl/core/ifwl_checkbox.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxgraphics/cfx_color.h"
 #include "xfa/fxgraphics/cfx_path.h"
 
 namespace {
 
 const int kSignPath = 100;
 
 }  // namespace
 
@@ skipping 336 matching lines @@
     case FWL_STYLEEXT_CKB_SignShapeSquare:
       DrawSignSquare(pGraphics, &rtSign, dwColor, pMatrix);
       break;
     case FWL_STYLEEXT_CKB_SignShapeStar:
       DrawSignStar(pGraphics, &rtSign, dwColor, pMatrix);
       break;
     default:
       break;
   }
 }