Get rid of CBC_AutoPtr and use std::unique_ptr instead.

xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.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
 // Original code is licensed as follows:
 /*
  * Copyright 2007 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
+#include "xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h"
+
+#include <memory>
+
 #include "xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
-#include "xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h"
 
 CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly(CBC_ReedSolomonGF256* field,
                                                    int32_t coefficients) {
   if (field == NULL) {
     return;
   }
   m_field = field;
   m_coefficients.Add(coefficients);
 }
 CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly() {
@@ skipping 174 matching lines @@
   temp->Init(m_field, &product, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
   return temp;
 }
 CFX_PtrArray* CBC_ReedSolomonGF256Poly::Divide(CBC_ReedSolomonGF256Poly* other,
                                                int32_t& e) {
   if (other->IsZero()) {
     e = BCExceptionDivideByZero;
     BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
   }
-  CBC_ReedSolomonGF256Poly* rsg1 = m_field->GetZero()->Clone(e);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> quotient(
+      m_field->GetZero()->Clone(e));
   BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-  CBC_AutoPtr<CBC_ReedSolomonGF256Poly> quotient(rsg1);
-  CBC_ReedSolomonGF256Poly* rsg2 = Clone(e);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> remainder(Clone(e));
   BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-  CBC_AutoPtr<CBC_ReedSolomonGF256Poly> remainder(rsg2);
   int32_t denominatorLeadingTerm = other->GetCoefficients(other->GetDegree());
   int32_t inverseDenominatorLeadingTeam =
       m_field->Inverse(denominatorLeadingTerm, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
   while (remainder->GetDegree() >= other->GetDegree() && !remainder->IsZero()) {
     int32_t degreeDifference = remainder->GetDegree() - other->GetDegree();
     int32_t scale =
         m_field->Multiply(remainder->GetCoefficients((remainder->GetDegree())),
                           inverseDenominatorLeadingTeam);
-    CBC_ReedSolomonGF256Poly* rsg3 =
-        other->MultiplyByMonomial(degreeDifference, scale, e);
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> term(
+        other->MultiplyByMonomial(degreeDifference, scale, e));
     BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> term(rsg3);
-    CBC_ReedSolomonGF256Poly* rsg4 =
-        m_field->BuildMonomial(degreeDifference, scale, e);
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> iteratorQuotient(
+        m_field->BuildMonomial(degreeDifference, scale, e));
     BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> iteratorQuotient(rsg4);
-    CBC_ReedSolomonGF256Poly* rsg5 =
-        quotient->AddOrSubtract(iteratorQuotient.get(), e);
+    quotient.reset(quotient->AddOrSubtract(iteratorQuotient.get(), e));
     BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp(rsg5);
-    quotient = temp;
-    CBC_ReedSolomonGF256Poly* rsg6 = remainder->AddOrSubtract(term.get(), e);
+    remainder.reset(remainder->AddOrSubtract(term.get(), e));
     BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp1(rsg6);
-    remainder = temp1;
   }
   CFX_PtrArray* tempPtrA = new CFX_PtrArray;
   tempPtrA->Add(quotient.release());
   tempPtrA->Add(remainder.release());
   return tempPtrA;
 }
 CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() {
   m_coefficients.RemoveAll();
 }