Cleanup CPDF_Stream:

core/src/fpdfdoc/doc_ap.cpp

Index: core/src/fpdfdoc/doc_ap.cpp
diff --git a/core/src/fpdfdoc/doc_ap.cpp b/core/src/fpdfdoc/doc_ap.cpp
index 77a1f1530671b63c2d4abc8cb566f58fbc553b6a..14855161a7cee62e05a323e786847b18f459bccd 100644
--- a/core/src/fpdfdoc/doc_ap.cpp
+++ b/core/src/fpdfdoc/doc_ap.cpp
@@ -427,11 +427,8 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
     pAnnotDict->SetAt("AP", pAPDict);
   }
   CPDF_Stream* pNormalStream = pAPDict->GetStream("N");
-  if (pNormalStream == NULL) {
-    pNormalStream = CPDF_Stream::Create(NULL, 0, NULL);
-    if (pNormalStream == NULL) {
-      return FALSE;
-    }
+  if (!pNormalStream) {
+    pNormalStream = new CPDF_Stream(nullptr, 0, nullptr);
     int32_t objnum = pDoc->AddIndirectObject(pNormalStream);
     pAnnotDict->GetDict("AP")->SetAtReference("N", pDoc, objnum);
   }