Make m_IndexArray sane.

core/src/fpdfapi/fpdf_edit/editint.h

Index: core/src/fpdfapi/fpdf_edit/editint.h
diff --git a/core/src/fpdfapi/fpdf_edit/editint.h b/core/src/fpdfapi/fpdf_edit/editint.h
index e80fdd3e6493488f26d3863819fb84507cc3c18d..85b4979824c059a5a10393a90453ff222f31e0b9 100644
--- a/core/src/fpdfapi/fpdf_edit/editint.h
+++ b/core/src/fpdfapi/fpdf_edit/editint.h
@@ -7,6 +7,8 @@
 #ifndef CORE_SRC_FPDFAPI_FPDF_EDIT_EDITINT_H_
 #define CORE_SRC_FPDFAPI_FPDF_EDIT_EDITINT_H_
 
+#include <vector>
+
 #include "core/include/fxcrt/fx_basic.h"
 #include "core/include/fxcrt/fx_stream.h"
 #include "core/include/fxcrt/fx_system.h"
@@ -38,25 +40,26 @@ class CPDF_ObjectStream {
 };
 class CPDF_XRefStream {
  public:
+  struct Index {
+    FX_DWORD objnum;
+    FX_DWORD count;
+  };
+
   CPDF_XRefStream();
 
   FX_BOOL Start();
-
   int32_t CompressIndirectObject(FX_DWORD dwObjNum,
                                  const CPDF_Object* pObj,
                                  CPDF_Creator* pCreator);
-
   int32_t CompressIndirectObject(FX_DWORD dwObjNum,
                                  const uint8_t* pBuffer,
                                  FX_DWORD dwSize,
                                  CPDF_Creator* pCreator);
-
   FX_BOOL End(CPDF_Creator* pCreator, FX_BOOL bEOF = FALSE);
-  FX_BOOL AddObjectNumberToIndexArray(FX_DWORD objnum);
+  void AddObjectNumberToIndexArray(FX_DWORD objnum);
   FX_BOOL EndXRefStream(CPDF_Creator* pCreator);
 
-  CFX_DWordArray m_IndexArray;
-
+  std::vector<Index> m_IndexArray;
   FX_FILESIZE m_PrevOffset;
   FX_DWORD m_dwTempObjNum;