Return unique_ptrs from CFX_DIBitmap::Clone().

core/fxge/agg/fx_agg_driver.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/fxge/agg/fx_agg_driver.h"
 
 #include <algorithm>
 #include <utility>
@@ skipping 1584 matching lines @@
   *pRect = m_pClipRgn->GetBox();
   return true;
 }
 
 bool CFX_AggDeviceDriver::GetDIBits(CFX_DIBitmap* pBitmap, int left, int top) {
   if (!m_pBitmap || !m_pBitmap->GetBuffer())
     return true;
 
   FX_RECT rect(left, top, left + pBitmap->GetWidth(),
                top + pBitmap->GetHeight());
-  CFX_DIBitmap* pBack = nullptr;
+  std::unique_ptr<CFX_DIBitmap> pBack;
   if (m_pOriDevice) {
     pBack = m_pOriDevice->Clone(&rect);
     if (!pBack)
       return true;
 
     pBack->CompositeBitmap(0, 0, pBack->GetWidth(), pBack->GetHeight(),
                            m_pBitmap, 0, 0);
   } else {
     pBack = m_pBitmap->Clone(&rect);
     if (!pBack)
       return true;
   }
 
-  bool bRet = true;
   left = std::min(left, 0);
   top = std::min(top, 0);
   if (m_bRgbByteOrder) {
     RgbByteOrderTransferBitmap(pBitmap, 0, 0, rect.Width(), rect.Height(),
-                               pBack, left, top);
-  } else {
-    bRet = pBitmap->TransferBitmap(0, 0, rect.Width(), rect.Height(), pBack,
-                                   left, top);
+                               pBack.get(), left, top);
+    return true;
   }
-  delete pBack;
-  return bRet;
+  return pBitmap->TransferBitmap(0, 0, rect.Width(), rect.Height(), pBack.get(),
+                                 left, top);
 }
 
 CFX_DIBitmap* CFX_AggDeviceDriver::GetBackDrop() {
   return m_pOriDevice;
 }
 
 bool CFX_AggDeviceDriver::SetDIBits(const CFX_DIBSource* pBitmap,
                                     uint32_t argb,
                                     const FX_RECT* pSrcRect,
                                     int left,
@@ skipping 110 matching lines @@
                                                           pOriDevice, false));
   return true;
 }
 
 CFX_FxgeDevice::~CFX_FxgeDevice() {
   if (m_bOwnedBitmap) {
     delete GetBitmap();
   }
 }
 #endif