Review and cleanup lint warnings.

fpdfsdk/include/pdfwindow/PWL_Signature.h

 // 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
 
 #ifndef FPDFSDK_INCLUDE_PDFWINDOW_PWL_SIGNATURE_H_
 #define FPDFSDK_INCLUDE_PDFWINDOW_PWL_SIGNATURE_H_
 
 #include "fpdfsdk/include/pdfwindow/PWL_Icon.h"
@@ skipping 20 matching lines @@
  private:
   CFX_DIBSource* m_pImage;
 };
 
 class CPWL_Signature : public CPWL_Wnd {
  public:
   CPWL_Signature();
   ~CPWL_Signature() override;
 
   void SetText(const FX_WCHAR* sText);
-  void SetDescription(const FX_WCHAR* string);
+  void SetDescription(const FX_WCHAR* str);
   void SetImage(CFX_DIBSource* pImage);
   void SetImageStream(CPDF_Stream* pStream, const FX_CHAR* sImageAlias);
 
   void SetTextFlag(FX_BOOL bTextExist);
   void SetImageFlag(FX_BOOL bImageExist);
   void SetFoxitFlag(FX_BOOL bFlagExist);
 
  protected:
   // CPWL_Wnd
   void RePosChildWnd() override;
   void CreateChildWnd(const PWL_CREATEPARAM& cp) override;
   void DrawThisAppearance(CFX_RenderDevice* pDevice,
                           CFX_Matrix* pUser2Device) override;
   void GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) override;
 
  private:
   CPWL_Label* m_pText;
   CPWL_Label* m_pDescription;
   CPWL_Signature_Image* m_pImage;
 
   FX_BOOL m_bTextExist;
   FX_BOOL m_bImageExist;
   FX_BOOL m_bFlagExist;
 };
 
 #endif  // FPDFSDK_INCLUDE_PDFWINDOW_PWL_SIGNATURE_H_