Return unique_ptrs from CFX_DIBitmap::Clone().

core/fpdfapi/render/cpdf_imagecacheentry.cpp

Index: core/fpdfapi/render/cpdf_imagecacheentry.cpp
diff --git a/core/fpdfapi/render/cpdf_imagecacheentry.cpp b/core/fpdfapi/render/cpdf_imagecacheentry.cpp
index 93ec162a7c2f377a8e97c84d25e36527da8f2278..932d281f98e993467762c4d6833361f366a134da 100644
--- a/core/fpdfapi/render/cpdf_imagecacheentry.cpp
+++ b/core/fpdfapi/render/cpdf_imagecacheentry.cpp
@@ -34,7 +34,7 @@ CPDF_ImageCacheEntry::~CPDF_ImageCacheEntry() {}
 void CPDF_ImageCacheEntry::Reset(const CFX_DIBitmap* pBitmap) {
   m_pCachedBitmap.reset();
   if (pBitmap)
-    m_pCachedBitmap = pdfium::WrapUnique<CFX_DIBSource>(pBitmap->Clone());
+    m_pCachedBitmap = pBitmap->Clone();
   CalcSize();
 }