Return unique_ptrs from CFX_DIBitmap::Clone().

core/fxge/dib/fx_dib_transform.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/dib/dib_int.h"
 
 #include <memory>
 #include <utility>
@@ skipping 283 matching lines @@
     rect.top = width - clip.left;
     rect.bottom = width - clip.right;
   } else {
     rect.top = clip.left;
     rect.bottom = clip.right;
   }
   rect.Normalize();
   return rect;
 }
 
-CFX_DIBitmap* CFX_DIBSource::TransformTo(const CFX_Matrix* pDestMatrix,
-                                         int& result_left,
-                                         int& result_top,
-                                         uint32_t flags,
-                                         const FX_RECT* pDestClip) const {
+std::unique_ptr<CFX_DIBitmap> CFX_DIBSource::TransformTo(
+    const CFX_Matrix* pDestMatrix,
+    int& result_left,
+    int& result_top,
+    uint32_t flags,
+    const FX_RECT* pDestClip) const {
   CFX_ImageTransformer transformer(this, pDestMatrix, flags, pDestClip);
   transformer.Start();
   transformer.Continue(nullptr);
   result_left = transformer.result().left;
   result_top = transformer.result().top;
-  return transformer.DetachBitmap().release();
+  return transformer.DetachBitmap();
 }
 
-CFX_DIBitmap* CFX_DIBSource::StretchTo(int dest_width,
-                                       int dest_height,
-                                       uint32_t flags,
-                                       const FX_RECT* pClip) const {
+std::unique_ptr<CFX_DIBitmap> CFX_DIBSource::StretchTo(
+    int dest_width,
+    int dest_height,
+    uint32_t flags,
+    const FX_RECT* pClip) const {
   FX_RECT clip_rect(0, 0, FXSYS_abs(dest_width), FXSYS_abs(dest_height));
   if (pClip)
     clip_rect.Intersect(*pClip);
 
   if (clip_rect.IsEmpty())
     return nullptr;
 
   if (dest_width == m_Width && dest_height == m_Height)
     return Clone(&clip_rect);
 
   CFX_BitmapStorer storer;
   CFX_ImageStretcher stretcher(&storer, this, dest_width, dest_height,
                                clip_rect, flags);
   if (stretcher.Start())
     stretcher.Continue(nullptr);
-  return storer.Detach().release();
+
+  return storer.Detach();
 }
 
 CFX_ImageTransformer::CFX_ImageTransformer(const CFX_DIBSource* pSrc,
                                            const CFX_Matrix* pMatrix,
                                            int flags,
                                            const FX_RECT* pClip)
     : m_pSrc(pSrc),
       m_pMatrix(pMatrix),
       m_pClip(pClip),
       m_Flags(flags),
@@ skipping 602 matching lines @@
       }
     }
   }
   m_Storer.Replace(std::move(pTransformed));
   return false;
 }
 
 std::unique_ptr<CFX_DIBitmap> CFX_ImageTransformer::DetachBitmap() {
   return m_Storer.Detach();
 }