More unique_ptr returns from DIB methods.

core/fxge/dib/fx_dib_main.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/fx_dib.h"
 
 #include <limits.h>
 
@@ skipping 1324 matching lines @@
         *scanline++ = bb + (fb - bb) * gray / 255;
         *scanline++ = bg + (fg - bg) * gray / 255;
         *scanline = br + (fr - br) * gray / 255;
         scanline += gap;
       }
     }
   }
   return true;
 }
 
-CFX_DIBitmap* CFX_DIBSource::FlipImage(bool bXFlip, bool bYFlip) const {
-  CFX_DIBitmap* pFlipped = new CFX_DIBitmap;
-  if (!pFlipped->Create(m_Width, m_Height, GetFormat())) {
-    delete pFlipped;
+std::unique_ptr<CFX_DIBitmap> CFX_DIBSource::FlipImage(bool bXFlip,
+                                                       bool bYFlip) const {
+  auto pFlipped = pdfium::MakeUnique<CFX_DIBitmap>();
+  if (!pFlipped->Create(m_Width, m_Height, GetFormat()))
     return nullptr;
-  }
+
   pFlipped->SetPalette(m_pPalette.get());
   uint8_t* pDestBuffer = pFlipped->GetBuffer();
   int Bpp = m_bpp / 8;
   for (int row = 0; row < m_Height; row++) {
     const uint8_t* src_scan = GetScanline(row);
     uint8_t* dest_scan =
         pDestBuffer + m_Pitch * (bYFlip ? (m_Height - row - 1) : row);
     if (!bXFlip) {
       FXSYS_memcpy(dest_scan, src_scan, m_Pitch);
       continue;
@@ skipping 276 matching lines @@
                                uint32_t* pSrcPalette) {
   m_pBitmap = pdfium::MakeUnique<CFX_DIBitmap>();
   if (!m_pBitmap->Create(width, height, src_format)) {
     m_pBitmap.reset();
     return false;
   }
   if (pSrcPalette)
     m_pBitmap->SetPalette(pSrcPalette);
   return true;
 }