Add type cast definitions for CPDF_String.

core/src/fpdfdoc/doc_basic.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 "../../include/fpdfdoc/fpdf_doc.h"
 const int nMaxRecursion = 32;
 int CPDF_Dest::GetPageIndex(CPDF_Document* pDoc) {
   if (m_pObj == NULL || m_pObj->GetType() != PDFOBJ_ARRAY) {
@@ skipping 388 matching lines @@
 static void FPDFDOC_FILESPEC_SetFileName(CPDF_Object* pObj,
                                          const CFX_WideStringC& wsFileName,
                                          FX_BOOL bURL) {
   ASSERT(pObj != NULL);
   CFX_WideString wsStr;
   if (bURL) {
     wsStr = wsFileName;
   } else {
     wsStr = FILESPEC_EncodeFileName(wsFileName);
   }
-  int32_t iType = pObj->GetType();
-  if (iType == PDFOBJ_STRING) {
+  if (pObj->IsString()) {
     pObj->SetString(CFX_ByteString::FromUnicode(wsStr));
   } else if (CPDF_Dictionary* pDict = pObj->AsDictionary()) {
     pDict->SetAtString(FX_BSTRC("F"), CFX_ByteString::FromUnicode(wsStr));
     pDict->SetAtString(FX_BSTRC("UF"), PDF_EncodeText(wsStr));
   }
 }
 void CPDF_FileSpec::SetFileName(const CFX_WideStringC& wsFileName,
                                 FX_BOOL bURL) {
   ASSERT(m_pObj != NULL);
   if (bURL) {
@@ skipping 116 matching lines @@
   int nPage = FXSYS_atoi(bsLbl);
   if (nPage > 0 && nPage <= nPages) {
     return nPage;
   }
   return -1;
 }
 int32_t CPDF_PageLabel::GetPageByLabel(const CFX_WideStringC& wsLabel) const {
   CFX_ByteString bsLabel = PDF_EncodeText(wsLabel.GetPtr());
   return GetPageByLabel(bsLabel);
 }