Make CPDF_Stream() take unique_ptr's to its dictionary.

fpdfsdk/cpdfsdk_baannot.cpp

 // Copyright 2016 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 "fpdfsdk/cpdfsdk_baannot.h"
 
 #include <algorithm>
 
@@ skipping 305 matching lines @@
   }
 
   if (!pStream) {
     CPDF_Document* pDoc = m_pPageView->GetPDFDocument();
     pStream = pDoc->NewIndirect<CPDF_Stream>();
     pParentDict->SetNewFor<CPDF_Reference>(sAPType, pDoc, pStream->GetObjNum());
   }
 
   CPDF_Dictionary* pStreamDict = pStream->GetDict();
   if (!pStreamDict) {
-    pStreamDict =
-        new CPDF_Dictionary(m_pAnnot->GetDocument()->GetByteStringPool());
+    auto pNewDict = pdfium::MakeUnique<CPDF_Dictionary>(
+        m_pAnnot->GetDocument()->GetByteStringPool());
+    pStreamDict = pNewDict.get();
     pStreamDict->SetNewFor<CPDF_Name>("Type", "XObject");
     pStreamDict->SetNewFor<CPDF_Name>("Subtype", "Form");
     pStreamDict->SetNewFor<CPDF_Number>("FormType", 1);
-    pStream->InitStream(nullptr, 0, pStreamDict);
+    pStream->InitStream(nullptr, 0, std::move(pNewDict));
   }
-
-  if (pStreamDict) {
-    pStreamDict->SetMatrixFor("Matrix", matrix);
-    pStreamDict->SetRectFor("BBox", rcBBox);
-  }
-
+  pStreamDict->SetMatrixFor("Matrix", matrix);
+  pStreamDict->SetRectFor("BBox", rcBBox);
   pStream->SetData((uint8_t*)sContents.c_str(), sContents.GetLength());
 }
 
 bool CPDFSDK_BAAnnot::IsVisible() const {
   uint32_t nFlags = GetFlags();
   return !((nFlags & ANNOTFLAG_INVISIBLE) || (nFlags & ANNOTFLAG_HIDDEN) ||
            (nFlags & ANNOTFLAG_NOVIEW));
 }
 
 CPDF_Action CPDFSDK_BAAnnot::GetAction() const {
@@ skipping 44 matching lines @@
                                    CPDF_RenderOptions* pOptions) {
   m_pAnnot->GetAPForm(m_pPageView->GetPDFPage(), CPDF_Annot::Normal);
   m_pAnnot->DrawAppearance(m_pPageView->GetPDFPage(), pDevice, pUser2Device,
                            CPDF_Annot::Normal, nullptr);
 }
 
 void CPDFSDK_BAAnnot::SetOpenState(bool bOpenState) {
   if (CPDF_Annot* pAnnot = m_pAnnot->GetPopupAnnot())
     pAnnot->SetOpenState(bOpenState);
 }