Add type cast definitions for CPDF_String.

core/src/fpdfdoc/doc_bookmark.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 <vector>
 
 #include "../../../third_party/base/nonstd_unique_ptr.h"
 #include "../../include/fpdfdoc/fpdf_doc.h"
@@ skipping 33 matching lines @@
 FX_DWORD CPDF_Bookmark::GetFontStyle() const {
   if (!m_pDict) {
     return 0;
   }
   return m_pDict->GetInteger("F");
 }
 CFX_WideString CPDF_Bookmark::GetTitle() const {
   if (!m_pDict) {
     return CFX_WideString();
   }
-  CPDF_String* pString = (CPDF_String*)m_pDict->GetElementValue("Title");
-  if (!pString || pString->GetType() != PDFOBJ_STRING) {
+  CPDF_String* pString = ToString(m_pDict->GetElementValue("Title"));
+  if (!pString)
     return CFX_WideString();
-  }
+
   CFX_WideString title = pString->GetUnicodeText();
   int len = title.GetLength();
   if (!len) {
     return CFX_WideString();
   }
   nonstd::unique_ptr<FX_WCHAR[]> buf(new FX_WCHAR[len]);
   for (int i = 0; i < len; i++) {
     FX_WCHAR w = title[i];
     buf[i] = w > 0x20 ? w : 0x20;
   }
   return CFX_WideString(buf.get(), len);
 }
 CPDF_Dest CPDF_Bookmark::GetDest(CPDF_Document* pDocument) const {
   if (!m_pDict) {
     return CPDF_Dest();
   }
   CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
   if (!pDest) {
     return CPDF_Dest();
   }
-  if (pDest->GetType() == PDFOBJ_STRING || pDest->GetType() == PDFOBJ_NAME) {
+  if (pDest->IsString() || pDest->GetType() == PDFOBJ_NAME) {
     CPDF_NameTree name_tree(pDocument, FX_BSTRC("Dests"));
     CFX_ByteStringC name = pDest->GetString();
     return CPDF_Dest(name_tree.LookupNamedDest(pDocument, name));
   }
   if (pDest->GetType() == PDFOBJ_ARRAY) {
     return CPDF_Dest((CPDF_Array*)pDest);
   }
   return CPDF_Dest();
 }
 CPDF_Action CPDF_Bookmark::GetAction() const {
   if (!m_pDict) {
     return CPDF_Action();
   }
   return CPDF_Action(m_pDict->GetDict("A"));
 }