Fix infinite recursion in CPDF_Parser::ParseIndirectObjectAt().

core/include/fxcrt/fx_basic.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 _FX_BASIC_H_
 #define _FX_BASIC_H_
 #ifndef _FX_SYSTEM_H_
 #include "fx_system.h"
@@ skipping 1396 matching lines @@
     virtual void        v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf) = 0;
     virtual void        v_FilterFinish(CFX_BinaryBuf& dest_buf) = 0;
     void                        ReportEOF(FX_DWORD left_input);
 
     FX_BOOL                     m_bEOF;
 
     FX_DWORD            m_SrcPos;
 
     CFX_DataFilter*     m_pDestFilter;
 };
+
+template<typename T>
+class CFX_AutoRestorer {
+public:
+    explicit CFX_AutoRestorer(T* location) {
+      m_Location = location;
+      m_OldValue = *location;
+    }
+    ~CFX_AutoRestorer() { *m_Location = m_OldValue; }
+
+private:
+  T* m_Location;
+  T m_OldValue;
+};
+
 template <class T>
 class CFX_SmartPointer
 {
 public:
     CFX_SmartPointer(T *pObj) : m_pObj(pObj) {}
     ~CFX_SmartPointer()
     {
         m_pObj->Release();
     }
     operator T*(void)
@@ skipping 207 matching lines @@
     FX_FLOAT c;
     FX_FLOAT d;
     FX_FLOAT e;
     FX_FLOAT f;
     FX_FLOAT g;
     FX_FLOAT h;
     FX_FLOAT i;
 };
 
 #endif