Review and cleanup lint warnings.

fpdfsdk/src/pdfwindow/PWL_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 "fpdfsdk/include/pdfwindow/PWL_ComboBox.h"
 
 #include "fpdfsdk/include/pdfwindow/PWL_Edit.h"
 #include "fpdfsdk/include/pdfwindow/PWL_EditCtrl.h"
@@ skipping 221 matching lines @@
     return m_pEdit->GetText();
   }
   return CFX_WideString();
 }
 
 void CPWL_ComboBox::SetText(const FX_WCHAR* text) {
   if (m_pEdit)
     m_pEdit->SetText(text);
 }
 
-void CPWL_ComboBox::AddString(const FX_WCHAR* string) {
+void CPWL_ComboBox::AddString(const FX_WCHAR* str) {
   if (m_pList)
-    m_pList->AddString(string);
+    m_pList->AddString(str);
 }
 
 int32_t CPWL_ComboBox::GetSelect() const {
   return m_nSelectItem;
 }
 
 void CPWL_ComboBox::SetSelect(int32_t nItemIndex) {
   if (m_pList)
     m_pList->Select(nItemIndex);
 
@@ skipping 387 matching lines @@
 
 void CPWL_ComboBox::SetFillerNotify(IPWL_Filler_Notify* pNotify) {
   m_pFillerNotify = pNotify;
 
   if (m_pEdit)
     m_pEdit->SetFillerNotify(pNotify);
 
   if (m_pList)
     m_pList->SetFillerNotify(pNotify);
 }