Cleanup widget edge related code

xfa/fwl/cfwl_datetimepicker.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/cfwl_datetimepicker.h"
 
 #include <memory>
 #include <utility>
@@ skipping 111 matching lines @@
 void CFWL_DateTimePicker::DrawWidget(CFX_Graphics* pGraphics,
                                      const CFX_Matrix* pMatrix) {
   if (!pGraphics)
     return;
   if (!m_pProperties->m_pThemeProvider)
     return;
 
   IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
   if (HasBorder())
     DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
-  if (HasEdge())
-    DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);
   if (!m_rtBtn.IsEmpty())
     DrawDropDownButton(pGraphics, pTheme, pMatrix);
   if (m_pWidgetMgr->IsFormDisabled()) {
     DisForm_DrawWidget(pGraphics, pMatrix);
     return;
   }
 }
 
 void CFWL_DateTimePicker::SetThemeProvider(IFWL_ThemeProvider* pTP) {
   m_pProperties->m_pThemeProvider = pTP;
@@ skipping 465 matching lines @@
     if (DisForm_IsMonthCalendarVisible())
       ShowMonthCalendar(false);
     if (m_pEdit->GetStates() & FWL_WGTSTATE_Focused) {
       pMsg->m_pSrcTarget = m_pEdit.get();
       m_pEdit->GetDelegate()->OnProcessMessage(pMsg);
     }
   }
   rtInvalidate.Inflate(2, 2);
   RepaintRect(rtInvalidate);
 }