Change class member variables in raw pointer type into unique_ptr

core/fpdfapi/fpdf_page/include/cpdf_formobject.h

 // Copyright 2016 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_FPDFAPI_FPDF_PAGE_INCLUDE_CPDF_FORMOBJECT_H_
 #define CORE_FPDFAPI_FPDF_PAGE_INCLUDE_CPDF_FORMOBJECT_H_
 
+#include <memory>
+
 #include "core/fpdfapi/fpdf_page/include/cpdf_pageobject.h"
 #include "core/fxcrt/include/fx_coordinates.h"
 
 class CPDF_Form;
 
 class CPDF_FormObject : public CPDF_PageObject {
  public:
   CPDF_FormObject();
   ~CPDF_FormObject() override;
 
   // CPDF_PageObject:
   CPDF_FormObject* Clone() const override;
   Type GetType() const override;
   void Transform(const CFX_Matrix& matrix) override;
   bool IsForm() const override;
   CPDF_FormObject* AsForm() override;
   const CPDF_FormObject* AsForm() const override;
 
   void CalcBoundingBox();
 
-  CPDF_Form* m_pForm;
+  std::unique_ptr<CPDF_Form> m_pForm;
   CFX_Matrix m_FormMatrix;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_PAGE_INCLUDE_CPDF_FORMOBJECT_H_