Merge to XFA: Remove dead code found by Scythe.

core/include/fpdfapi/fpdf_pageobj.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 CORE_INCLUDE_FPDFAPI_FPDF_PAGEOBJ_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_PAGEOBJ_H_
 
 #include "../fxge/fx_ge.h"
@@ skipping 651 matching lines @@
 {
 public:
     CPDF_ShadingObject();
 
     virtual ~CPDF_ShadingObject();
 
     CPDF_ShadingPattern*        m_pShading;
 
     CFX_AffineMatrix    m_Matrix;
 
-    CPDF_Page*                  m_pPage;
     void Transform(const CFX_AffineMatrix& matrix) override;
 
     void                                CalcBoundingBox();
 
 protected:
     void CopyData(const CPDF_PageObject* pSrcObject) override;
 };
 
 class CPDF_FormObject : public CPDF_PageObject
 {
@@ skipping 11 matching lines @@
 
     CFX_AffineMatrix    m_FormMatrix;
 
     void                                CalcBoundingBox();
 
 protected:
     void CopyData(const CPDF_PageObject* pSrcObject) override;
 };
 
 #endif  // CORE_INCLUDE_FPDFAPI_FPDF_PAGEOBJ_H_