Use smart pointers for class owned member variables

core/fpdfapi/fpdf_render/fpdf_render_loadimage.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_render/render_int.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 1530 matching lines @@
     if (!ret) {
       m_pImageLoader->m_bCached = FALSE;
       m_pImageLoader->m_pBitmap = m_pImage->m_pImage->DetachBitmap();
       m_pImageLoader->m_pMask = m_pImage->m_pImage->DetachMask();
       m_pImageLoader->m_MatteColor = m_pImage->m_pImage->m_MatteColor;
     }
   }
   return ret;
 }
 
-FX_BOOL CPDF_ImageLoader::Start(const CPDF_ImageObject* pImage,
-                                CPDF_PageRenderCache* pCache,
-                                CPDF_ImageLoaderHandle*& LoadHandle,
-                                FX_BOOL bStdCS,
-                                uint32_t GroupFamily,
-                                FX_BOOL bLoadMask,
-                                CPDF_RenderStatus* pRenderStatus,
-                                int32_t nDownsampleWidth,
-                                int32_t nDownsampleHeight) {
+FX_BOOL CPDF_ImageLoader::Start(
+    const CPDF_ImageObject* pImage,
+    CPDF_PageRenderCache* pCache,
+    std::unique_ptr<CPDF_ImageLoaderHandle>* pLoadHandle,
+    FX_BOOL bStdCS,
+    uint32_t GroupFamily,
+    FX_BOOL bLoadMask,
+    CPDF_RenderStatus* pRenderStatus,
+    int32_t nDownsampleWidth,
+    int32_t nDownsampleHeight) {
   m_nDownsampleWidth = nDownsampleWidth;
   m_nDownsampleHeight = nDownsampleHeight;
-  LoadHandle = new CPDF_ImageLoaderHandle;
-  return LoadHandle->Start(this, pImage, pCache, bStdCS, GroupFamily, bLoadMask,
-                           pRenderStatus, m_nDownsampleWidth,
-                           m_nDownsampleHeight);
+  pLoadHandle->reset(new CPDF_ImageLoaderHandle);
+  return (*pLoadHandle)
+      ->Start(this, pImage, pCache, bStdCS, GroupFamily, bLoadMask,
+              pRenderStatus, m_nDownsampleWidth, m_nDownsampleHeight);
 }
 
 FX_BOOL CPDF_ImageLoader::Continue(CPDF_ImageLoaderHandle* LoadHandle,
                                    IFX_Pause* pPause) {
   return LoadHandle->Continue(pPause);
 }
 
 CPDF_ImageLoader::~CPDF_ImageLoader() {
   if (!m_bCached) {
     delete m_pBitmap;
     delete m_pMask;
   }
 }