Make CPDF_Function::Load() return an unique_ptr.

core/fpdfapi/fpdf_page/fpdf_page_doc.cpp

 // 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
 
 #include "core/fpdfapi/fpdf_page/pageint.h"
 
 #include "core/fdrm/crypto/include/fx_crypt.h"
 #include "core/fpdfapi/fpdf_font/cpdf_type1font.h"
@@ skipping 312 matching lines @@
   CPDF_CountedPattern* ptData = nullptr;
   auto it = m_PatternMap.find(pPatternObj);
   if (it != m_PatternMap.end()) {
     ptData = it->second;
     if (ptData->get()) {
       return ptData->AddRef();
     }
   }
   CPDF_Pattern* pPattern = nullptr;
   if (bShading) {
-    pPattern =
-        new CPDF_ShadingPattern(m_pPDFDoc, pPatternObj, bShading, matrix);
+    pPattern = new CPDF_ShadingPattern(m_pPDFDoc, pPatternObj, TRUE, matrix);
   } else {
     CPDF_Dictionary* pDict = pPatternObj ? pPatternObj->GetDict() : nullptr;
     if (pDict) {
       int type = pDict->GetIntegerBy("PatternType");
       if (type == CPDF_Pattern::TILING) {
         pPattern = new CPDF_TilingPattern(m_pPDFDoc, pPatternObj, matrix);
       } else if (type == CPDF_Pattern::SHADING) {
         pPattern =
             new CPDF_ShadingPattern(m_pPDFDoc, pPatternObj, FALSE, matrix);
       }
@@ skipping 166 matching lines @@
 }
 
 CPDF_CountedPattern* CPDF_DocPageData::FindPatternPtr(
     CPDF_Object* pPatternObj) const {
   if (!pPatternObj)
     return nullptr;
 
   auto it = m_PatternMap.find(pPatternObj);
   return it != m_PatternMap.end() ? it->second : nullptr;
 }