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

xfa/fde/ifde_txtedtengine.h

 // 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
 
 #ifndef XFA_FDE_IFDE_TXTEDTENGINE_H_
 #define XFA_FDE_IFDE_TXTEDTENGINE_H_
 
 #include "core/fxge/fx_dib.h"
 #include "xfa/fgas/font/fgas_font.h"
 
 class CFDE_TxtEdtEngine;
-class CFWL_EditImp;
 class IFDE_TxtEdtPage;
+class IFWL_Edit;
 
 #define FDE_TEXTEDITMODE_MultiLines (1L << 0)
 #define FDE_TEXTEDITMODE_AutoLineWrap (1L << 1)
 #define FDE_TEXTEDITMODE_ReadOnly (1L << 2)
 #define FDE_TEXTEDITMODE_LimitArea_Vert (1L << 3)
 #define FDE_TEXTEDITMODE_LimitArea_Horz (1L << 4)
 #define FDE_TEXTEDITMODE_NoRedoUndo (1L << 5)
 #define FDE_TEXTEDITMODE_FIELD_TAB (1L << 6)
 #define FDE_TEXTEDITMODE_FIELD_AUTO (1L << 7)
 #define FDE_TEXTEDITMODE_Validate (1L << 8)
@@ skipping 69 matching lines @@
   FX_ARGB dwFontColor;
   FX_FLOAT fLineSpace;
   FX_FLOAT fTabWidth;
   FX_BOOL bTabEquidistant;
   FX_WCHAR wDefChar;
   FX_WCHAR wLineBreakChar;
   int32_t nCharRotation;
   int32_t nLineEnd;
   int32_t nHorzScale;
   FX_FLOAT fCharSpace;
-  CFWL_EditImp* pEventSink;
+  IFWL_Edit* pEventSink;
 };
 
 enum FDE_TXTEDT_TEXTCHANGE_TYPE {
   FDE_TXTEDT_TEXTCHANGE_TYPE_Insert = 0,
   FDE_TXTEDT_TEXTCHANGE_TYPE_Delete,
   FDE_TXTEDT_TEXTCHANGE_TYPE_Replace,
 };
 
 struct FDE_TXTEDT_TEXTCHANGE_INFO {
   FDE_TXTEDT_TEXTCHANGE_INFO();
   ~FDE_TXTEDT_TEXTCHANGE_INFO();
 
   int32_t nChangeType;
   CFX_WideString wsInsert;
   CFX_WideString wsDelete;
   CFX_WideString wsPrevText;
 };
 
 #endif  // XFA_FDE_IFDE_TXTEDTENGINE_H_