Return unique_ptrs from CFX_DIBitmap::Clone().

core/fpdfapi/render/cpdf_type3cache.cpp

Index: core/fpdfapi/render/cpdf_type3cache.cpp
diff --git a/core/fpdfapi/render/cpdf_type3cache.cpp b/core/fpdfapi/render/cpdf_type3cache.cpp
index ba92142dbf068f288a5bcedcf4aa4fff530cb5a4..b27fdf507e9413d44634ae955ae80613288629bb 100644
--- a/core/fpdfapi/render/cpdf_type3cache.cpp
+++ b/core/fpdfapi/render/cpdf_type3cache.cpp
@@ -143,10 +143,10 @@ CFX_GlyphBitmap* CPDF_Type3Cache::RenderGlyph(CPDF_Type3Glyphs* pSize,
         bottom_y = temp;
       }
       pSize->AdjustBlue(top_y, bottom_y, top_line, bottom_line);
-      pResBitmap.reset(pBitmap->StretchTo(
+      pResBitmap = pBitmap->StretchTo(
           (int)(FXSYS_round(image_matrix.a) * retinaScaleX),
           (int)((bFlipped ? top_line - bottom_line : bottom_line - top_line) *
-                retinaScaleY)));
+                retinaScaleY));
       top = top_line;
       if (image_matrix.a < 0) {
         image_matrix.Scale(retinaScaleX, retinaScaleY);
@@ -158,7 +158,7 @@ CFX_GlyphBitmap* CPDF_Type3Cache::RenderGlyph(CPDF_Type3Glyphs* pSize,
   }
   if (!pResBitmap) {
     image_matrix.Scale(retinaScaleX, retinaScaleY);
-    pResBitmap.reset(pBitmap->TransformTo(&image_matrix, left, top));
+    pResBitmap = pBitmap->TransformTo(&image_matrix, left, top);
   }
   if (!pResBitmap)
     return nullptr;