Cleanup widget edge related code

xfa/fwl/cfwl_edit.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_edit.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 249 matching lines @@
   if (!m_pWidgetMgr->IsFormDisabled())
     DrawTextBk(pGraphics, pTheme, pMatrix);
   DrawContent(pGraphics, pTheme, pMatrix);
 
   if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) &&
       !(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_ReadOnly)) {
     DrawSpellCheck(pGraphics, pMatrix);
   }
   if (HasBorder())
     DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
-  if (HasEdge())
-    DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);
 }
 
 void CFWL_Edit::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   if (!pThemeProvider)
     return;
   if (m_pHorzScrollBar)
     m_pHorzScrollBar->SetThemeProvider(pThemeProvider);
   if (m_pVertScrollBar)
     m_pVertScrollBar->SetThemeProvider(pThemeProvider);
   if (m_pCaret)
@@ skipping 1304 matching lines @@
   pScrollBar->SetTrackPos(fPos);
   UpdateOffset(pScrollBar, fPos - iCurPos);
   UpdateCaret();
 
   CFX_RectF rect = GetWidgetRect();
   CFX_RectF rtInvalidate;
   rtInvalidate.Set(0, 0, rect.width + 2, rect.height + 2);
   RepaintRect(rtInvalidate);
   return true;
 }