Reduce usage of operator LPCWSTR from CFX_WideString().

core/include/fpdfdoc/fpdf_doc.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 _FPDF_DOC_H_
 #define _FPDF_DOC_H_
 #ifndef _FPDF_PARSER_
 #include "../fpdfapi/fpdf_parser.h"
@@ skipping 1144 matching lines @@
 
 
     int                                         CountOptions();
 
     CFX_WideString                      GetOptionLabel(int index);
 
     CFX_WideString                      GetOptionValue(int index);
 
     int                                         FindOption(CFX_WideString csOptLabel);
 
-    int                                         FindOptionValue(FX_LPCWSTR csOptValue, int iStartIndex = 0);
+    int                                         FindOptionValue(const CFX_WideString& csOptValue, int iStartIndex = 0);
 
 
 
 
     FX_BOOL                                     CheckControl(int iControlIndex, FX_BOOL bChecked, FX_BOOL bNotify = FALSE);
 
 
 
 
     int                                         GetTopVisibleIndex();
@@ skipping 569 matching lines @@
     FX_FLOAT                            GetOriginalColor(int index, FX_BSTR csEntry);
 
     void                                        GetOriginalColor(int& iColorType, FX_FLOAT fc[4], FX_BSTR csEntry);
 
     CFX_WideString                      GetCaption(FX_BSTR csEntry);
 
     CPDF_Stream*                        GetIcon(FX_BSTR csEntry);
     friend class                        CPDF_FormControl;
 };
 #endif