Remove some usage of |return XXX.release()| anti-pattern.

core/fpdfapi/font/cpdf_type3char.cpp

Index: core/fpdfapi/font/cpdf_type3char.cpp
diff --git a/core/fpdfapi/font/cpdf_type3char.cpp b/core/fpdfapi/font/cpdf_type3char.cpp
index 41ab82471753fed0c69466db9ba21e642ebb01eb..5eb12c175260228a90cc8a673b3be202c3fffbe2 100644
--- a/core/fpdfapi/font/cpdf_type3char.cpp
+++ b/core/fpdfapi/font/cpdf_type3char.cpp
@@ -29,8 +29,8 @@ bool CPDF_Type3Char::LoadBitmap(CPDF_RenderContext* pContext) {
     return false;
 
   m_ImageMatrix = pPageObj->AsImage()->matrix();
-  std::unique_ptr<CFX_DIBSource> pSource(
-      pPageObj->AsImage()->GetImage()->LoadDIBSource());
+  std::unique_ptr<CFX_DIBSource> pSource =
+      pPageObj->AsImage()->GetImage()->LoadDIBSource();
   if (pSource)
     m_pBitmap = pSource->Clone();
   m_pForm.reset();