Remove more unused widget styles

xfa/fwl/cfwl_form.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_form.h"
 
 #include <utility>
 
@@ skipping 81 matching lines @@
   param.m_pWidget = this;
   param.m_dwStates = CFWL_PartState_Normal;
   param.m_pGraphics = pGraphics;
   param.m_rtPart = m_rtRelative;
   if (pMatrix)
     param.m_matrix.Concat(*pMatrix);
   if (m_pProperties->m_dwStyles & FWL_WGTSTYLE_Border) {
     param.m_iPart = CFWL_Part::Border;
     pTheme->DrawBackground(&param);
   }
-  if ((m_pProperties->m_dwStyleExes & FWL_WGTSTYLE_EdgeMask) !=
-      FWL_WGTSTYLE_EdgeNone) {
-    param.m_iPart = CFWL_Part::Edge;
-    param.m_rtPart = GetEdgeRect();
-    param.m_dwStates = CFWL_PartState_Normal;
-    pTheme->DrawBackground(&param);
-  }
 }
 
 CFWL_Widget* CFWL_Form::DoModal() {
   const CFWL_App* pApp = GetOwnerApp();
   if (!pApp)
     return nullptr;
 
   CFWL_NoteDriver* pDriver = pApp->GetNoteDriver();
   if (!pDriver)
     return nullptr;
@@ skipping 133 matching lines @@
   DrawWidget(pGraphics, pMatrix);
 }
 
 void CFWL_Form::OnLButtonDown(CFWL_MessageMouse* pMsg) {
   SetGrab(true);
 }
 
 void CFWL_Form::OnLButtonUp(CFWL_MessageMouse* pMsg) {
   SetGrab(false);
 }