Make CPDF_Function::Load() return an unique_ptr.

core/fpdfapi/fpdf_page/cpdf_shadingobject.cpp

 // 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
 
 #include "core/fpdfapi/fpdf_page/include/cpdf_shadingobject.h"
 
 #include "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h"
 #include "core/fpdfapi/fpdf_page/pageint.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 
 CPDF_ShadingObject::CPDF_ShadingObject() : m_pShading(nullptr) {}
 
 CPDF_ShadingObject::~CPDF_ShadingObject() {}
 
 CPDF_ShadingObject* CPDF_ShadingObject::Clone() const {
   CPDF_ShadingObject* obj = new CPDF_ShadingObject;
   obj->CopyData(this);
 
   obj->m_pShading = m_pShading;
   if (obj->m_pShading && obj->m_pShading->document()) {
     CPDF_DocPageData* pDocPageData = obj->m_pShading->document()->GetPageData();
     CPDF_Pattern* pattern = pDocPageData->GetPattern(
-        obj->m_pShading->m_pShadingObj, m_pShading->m_bShadingObj,
+        obj->m_pShading->GetShadingObject(), m_pShading->IsShadingObject(),
         obj->m_pShading->parent_matrix());
     obj->m_pShading = pattern ? pattern->AsShadingPattern() : nullptr;
   }
   obj->m_Matrix = m_Matrix;
   return obj;
 }
 
 void CPDF_ShadingObject::Transform(const CFX_Matrix& matrix) {
   if (!m_ClipPath.IsNull()) {
     m_ClipPath.GetModify();
@@ skipping 10 matching lines @@
 void CPDF_ShadingObject::CalcBoundingBox() {
   if (m_ClipPath.IsNull()) {
     return;
   }
   CFX_FloatRect rect = m_ClipPath.GetClipBox();
   m_Left = rect.left;
   m_Bottom = rect.bottom;
   m_Right = rect.right;
   m_Top = rect.top;
 }