Fix prototypes for CPDF_FormNotify.

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 979 matching lines @@
 
   CPDF_Dictionary* m_pWidgetDict;
   friend class CPDF_InterForm;
   friend class CPDF_FormField;
 };
 
 class CPDF_FormNotify {
  public:
   virtual ~CPDF_FormNotify() {}
 
-  virtual int BeforeValueChange(const CPDF_FormField* pField,
-                                CFX_WideString& csValue) {
+  virtual int BeforeValueChange(CPDF_FormField* pField,
+                                const CFX_WideString& csValue) {
     return 0;
   }
-  virtual int AfterValueChange(const CPDF_FormField* pField) { return 0; }
-
-  virtual int BeforeSelectionChange(const CPDF_FormField* pField,
-                                    CFX_WideString& csValue) {
+  virtual void AfterValueChange(CPDF_FormField* pField) {}
+  virtual int BeforeSelectionChange(CPDF_FormField* pField,
+                                    const CFX_WideString& csValue) {
     return 0;
   }
-  virtual int AfterSelectionChange(const CPDF_FormField* pField) { return 0; }
-
+  virtual void AfterSelectionChange(CPDF_FormField* pField) {}
   virtual void AfterCheckedStatusChange(CPDF_FormField* pField) {}
-  virtual int BeforeFormReset(const CPDF_InterForm* pForm) { return 0; }
-  virtual int AfterFormReset(const CPDF_InterForm* pForm) { return 0; }
-  virtual int BeforeFormImportData(const CPDF_InterForm* pForm) { return 0; }
-  virtual int AfterFormImportData(const CPDF_InterForm* pForm) { return 0; }
+  virtual int BeforeFormReset(CPDF_InterForm* pForm) { return 0; }
+  virtual void AfterFormReset(CPDF_InterForm* pForm) {}
+  virtual int BeforeFormImportData(CPDF_InterForm* pForm) { return 0; }
+  virtual void AfterFormImportData(CPDF_InterForm* pForm) {}
 };
 
 FX_BOOL FPDF_GenerateAP(CPDF_Document* pDoc, CPDF_Dictionary* pAnnotDict);
 class CPDF_PageLabel {
  public:
   explicit CPDF_PageLabel(CPDF_Document* pDocument) { m_pDocument = pDocument; }
 
   CFX_WideString GetLabel(int nPage) const;
 
   int32_t GetPageByLabel(const CFX_ByteStringC& bsLabel) const;
@@ skipping 96 matching lines @@
   CFX_WideString GetCaption(const CFX_ByteStringC& csEntry) const;
 
   CPDF_Stream* GetIcon(const CFX_ByteStringC& csEntry) const;
 
   CPDF_Dictionary* const m_pDict;
 };
 
 CFX_WideString FILESPEC_EncodeFileName(const CFX_WideStringC& filepath);
 
 #endif  // CORE_INCLUDE_FPDFDOC_FPDF_DOC_H_