Remove IFWL_CombobBox::DataProvider

xfa/fwl/core/cfwl_combobox.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/core/cfwl_combobox.h"
 
 #include <utility>
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/fwl_error.h"
 #include "xfa/fwl/core/ifwl_combobox.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 namespace {
 
 IFWL_ComboBox* ToComboBox(IFWL_Widget* widget) {
   return static_cast<IFWL_ComboBox*>(widget);
 }
 
 }  // namespace
 
-CFWL_ComboBox::CFWL_ComboBox(const CFWL_App* app)
-    : CFWL_Widget(app), m_fMaxListHeight(0) {}
+CFWL_ComboBox::CFWL_ComboBox(const CFWL_App* app) : CFWL_Widget(app) {}
 
 CFWL_ComboBox::~CFWL_ComboBox() {}
 
 void CFWL_ComboBox::Initialize() {
   ASSERT(!m_pIface);
 
   m_pIface = pdfium::MakeUnique<IFWL_ComboBox>(
       m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>(this));
 
   CFWL_Widget::Initialize();
 }
 
 void CFWL_ComboBox::AddString(const CFX_WideStringC& wsText) {
   if (GetWidget())
     ToComboBox(GetWidget())->AddString(wsText);
 }
 
 bool CFWL_ComboBox::RemoveAt(int32_t iIndex) {
   return GetWidget() && ToComboBox(GetWidget())->RemoveAt(iIndex);
 }
 
 void CFWL_ComboBox::RemoveAll() {
   if (GetWidget())
     ToComboBox(GetWidget())->RemoveAll();
 }
 
-FX_FLOAT CFWL_ComboBox::GetListHeight(IFWL_Widget* pWidget) {
-  return m_fMaxListHeight;
-}
-
 void CFWL_ComboBox::GetTextByIndex(int32_t iIndex,
                                    CFX_WideString& wsText) const {
   if (!GetWidget())
     return;
   ToComboBox(GetWidget())->GetTextByIndex(iIndex, wsText);
 }
 
 int32_t CFWL_ComboBox::GetCurSel() const {
   return GetWidget() ? ToComboBox(GetWidget())->GetCurSel() : -1;
 }
@@ skipping 79 matching lines @@
     ToComboBox(GetWidget())->GetBBox(rect);
 }
 
 void CFWL_ComboBox::EditModifyStylesEx(uint32_t dwStylesExAdded,
                                        uint32_t dwStylesExRemoved) {
   if (GetWidget()) {
     ToComboBox(GetWidget())
         ->EditModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
   }
 }