Make CPDF_Object::GetString() a virtual method.

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 CORE_INCLUDE_FPDFDOC_FPDF_DOC_H_
 #define CORE_INCLUDE_FPDFDOC_FPDF_DOC_H_
 
 #include <map>
@@ skipping 183 matching lines @@
         m_pDict = pDict;
     }
 
     operator CPDF_Dictionary* () const
     {
         return m_pDict;
     }
 
     inline CFX_ByteString       GetFileName()
     {
-        return m_pDict->GetString("F");
+        return m_pDict->GetStringAt("F");
     }
 
 
     inline CFX_ByteString       GetDefaultDirectory()
     {
-        return m_pDict->GetString("D");
+        return m_pDict->GetStringAt("D");
     }
 
 
     inline CFX_ByteString       GetOperation()
     {
-        return m_pDict->GetString("O");
+        return m_pDict->GetStringAt("O");
     }
 
 
     inline CFX_ByteString       GetParameter()
     {
-        return m_pDict->GetString("P");
+        return m_pDict->GetStringAt("P");
     }
 
     CPDF_Dictionary*            m_pDict;
 };
 class CPDF_ActionFields
 {
 public:
 
     CPDF_ActionFields(const CPDF_Action* pAction)
     {
@@ skipping 46 matching lines @@
 
     CPDF_Action() : m_pDict(nullptr) { }
     explicit CPDF_Action(CPDF_Dictionary* pDict) : m_pDict(pDict) { }
 
     operator bool () const { return m_pDict != NULL; }
 
     CPDF_Dictionary* GetDict() const { return m_pDict; }
 
     CFX_ByteString              GetTypeName() const
     {
-        return m_pDict->GetString("S");
+        return m_pDict->GetStringAt("S");
     }
 
     ActionType                  GetType() const;
 
     CPDF_Dest                   GetDest(CPDF_Document* pDoc) const;
 
     CFX_WideString              GetFilePath() const;
 
     FX_BOOL                             GetNewWindow() const
     {
@@ skipping 14 matching lines @@
         return this;
     }
 
     FX_BOOL                             GetHideStatus() const
     {
         return m_pDict->GetBoolean("H", TRUE);
     }
 
     CFX_ByteString              GetNamedAction() const
     {
-        return m_pDict->GetString("N");
+        return m_pDict->GetStringAt("N");
     }
 
     FX_DWORD                    GetFlags() const
     {
         return m_pDict->GetInteger("Flags");
     }
 
     CFX_WideString              GetJavaScript() const;
 
     CPDF_Dictionary*    GetAnnot() const;
@@ skipping 1360 matching lines @@
 
     void                                        GetOriginalColor(int& iColorType, FX_FLOAT fc[4], const CFX_ByteStringC& csEntry);
 
     CFX_WideString                      GetCaption(const CFX_ByteStringC& csEntry);
 
     CPDF_Stream*                        GetIcon(const CFX_ByteStringC& csEntry);
     friend class                        CPDF_FormControl;
 };
 
 #endif  // CORE_INCLUDE_FPDFDOC_FPDF_DOC_H_