Kill dead IFWL_*::Initialize() variants dead.

xfa/include/fwl/basewidget/fwl_caret.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 _FWL_CARET_H
 #define _FWL_CARET_H
 class CFWL_WidgetImpProperties;
 class IFWL_Widget;
 class IFWL_Caret;
 #define FWL_CLASS_Caret L"FWL_CARET"
 #define FWL_CLASSHASH_Caret 671181879
 #define FWL_STATE_CAT_HightLight 1
 #define FWL_PART_CAT_Background 1
 #define FWL_PARTSTATE_CAT_HightLight 1
 class IFWL_Caret : public IFWL_Widget {
  public:
   static IFWL_Caret* Create();
+
   FWL_ERR Initialize(IFWL_Widget* pOuter = NULL);
   FWL_ERR Initialize(const CFWL_WidgetImpProperties& properties,
-                     IFWL_Widget* pOuter = NULL);
+                     IFWL_Widget* pOuter);
 
   FWL_ERR ShowCaret(FX_BOOL bFlag = TRUE);
   FWL_ERR GetFrequency(FX_DWORD& elapse);
   FWL_ERR SetFrequency(FX_DWORD elapse);
   FWL_ERR SetColor(CFX_Color crFill);
 
  protected:
   IFWL_Caret();
 };
 #endif