Remove foo != NULL checks in xfa/src/fxbarcode.

xfa/src/fxbarcode/qrcode/BC_QRCodeReader.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");
@@ skipping 28 matching lines @@
 #include "xfa/src/fxbarcode/qrcode/BC_QRDataMask.h"
 #include "xfa/src/fxbarcode/qrcode/BC_QRDetector.h"
 #include "xfa/src/fxbarcode/qrcode/BC_QRDetectorResult.h"
 
 CBC_QRCodeReader::CBC_QRCodeReader() : m_decoder(NULL) {}
 void CBC_QRCodeReader::Init() {
   m_decoder = new CBC_QRCoderDecoder;
   m_decoder->Init();
 }
 CBC_QRCodeReader::~CBC_QRCodeReader() {
-  if (m_decoder != NULL) {
-    delete m_decoder;
-  }
-  m_decoder = NULL;
+  delete m_decoder;
 }
 CFX_ByteString CBC_QRCodeReader::Decode(CBC_BinaryBitmap* image,
                                         int32_t hints,
                                         int32_t& e) {
   CBC_CommonBitMatrix* matrix = image->GetMatrix(e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   CBC_QRDetector detector(matrix);
   CBC_QRDetectorResult* qdr = detector.Detect(hints, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   CBC_AutoPtr<CBC_QRDetectorResult> detectorResult(qdr);
@@ skipping 39 matching lines @@
   }
   if (CBC_ReedSolomonGF256::DataMatrixField) {
     delete CBC_ReedSolomonGF256::DataMatrixField;
     CBC_ReedSolomonGF256::DataMatrixField = NULL;
   }
   CBC_QRCoderMode::Destroy();
   CBC_QRCoderErrorCorrectionLevel::Destroy();
   CBC_QRDataMask::Destroy();
   CBC_QRCoderVersion::Destroy();
 }