Update CPDF_IndirectObjectHolder APIs for unique objects.

Doing so highlights a few places where ownership is dubious.
Add convenience functions to return an unowned reference to
a newly-created indirect object.

Review-Url: https://codereview.chromium.org/2419173002

2 files changed, 13 insertions, 17 deletions

diff --git a/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
index ad1ffaf687..654b69ec4a 100644
--- a/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
+++ b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
@@ -52,10 +52,9 @@ void CPDF_PageContentGenerator::GenerateContent() {
   if (pContent)
     pPageDict->RemoveFor("Contents");
 
-  CPDF_Stream* pStream = new CPDF_Stream;
+  CPDF_Stream* pStream = m_pDocument->AddIndirectStream();
   pStream->SetData(buf.GetBuffer(), buf.GetLength());
-  pPageDict->SetReferenceFor("Contents", m_pDocument,
-                             m_pDocument->AddIndirectObject(pStream));
+  pPageDict->SetReferenceFor("Contents", m_pDocument, pStream);
 }
 
 CFX_ByteString CPDF_PageContentGenerator::RealizeResource(
@@ -63,10 +62,9 @@ CFX_ByteString CPDF_PageContentGenerator::RealizeResource(
     const CFX_ByteString& bsType) {
   if (!m_pPage->m_pResources) {
     m_pPage->m_pResources =
-        new CPDF_Dictionary(m_pDocument->GetByteStringPool());
-    m_pPage->m_pFormDict->SetReferenceFor(
-        "Resources", m_pDocument,
-        m_pDocument->AddIndirectObject(m_pPage->m_pResources));
+        m_pDocument->AddIndirectDictionary(m_pDocument->GetByteStringPool());
+    m_pPage->m_pFormDict->SetReferenceFor("Resources", m_pDocument,
+                                          m_pPage->m_pResources);
   }
   CPDF_Dictionary* pResList = m_pPage->m_pResources->GetDictFor(bsType);
   if (!pResList) {
@@ -82,8 +80,9 @@ CFX_ByteString CPDF_PageContentGenerator::RealizeResource(
     }
     idnum++;
   }
-  pResList->SetReferenceFor(name, m_pDocument,
-                            m_pDocument->AddIndirectObject(pResourceObj));
+  // TODO(tsepez): check |pResourceObj| ownership.
+  pResList->SetReferenceFor(name, m_pDocument, m_pDocument->AddIndirectObject(
+                                                   UniqueObject(pResourceObj)));
   return name;
 }
 
@@ -170,8 +169,7 @@ void CPDF_PageContentGenerator::TransformContent(CFX_Matrix& matrix) {
     contentStream.LoadAllData(pStream);
     ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix);
   }
-  CPDF_Stream* pStream = new CPDF_Stream;
+  CPDF_Stream* pStream = m_pDocument->AddIndirectStream();
   pStream->SetData(buf.GetBuffer(), buf.GetLength());
-  m_pPage->m_pFormDict->SetReferenceFor(
-      "Contents", m_pDocument, m_pDocument->AddIndirectObject(pStream));
+  m_pPage->m_pFormDict->SetReferenceFor("Contents", m_pDocument, pStream);
 }
diff --git a/core/fpdfapi/edit/fpdf_edit_create.cpp b/core/fpdfapi/edit/fpdf_edit_create.cpp
index fae2b14449..5622b1dae7 100644
--- a/core/fpdfapi/edit/fpdf_edit_create.cpp
+++ b/core/fpdfapi/edit/fpdf_edit_create.cpp
@@ -1244,12 +1244,10 @@ int32_t CPDF_Creator::WriteOldIndirectObject(uint32_t objnum) {
       m_ObjectOffset[objnum] = 0;
       return 0;
     }
-    if (WriteIndirectObj(pObj)) {
+    if (WriteIndirectObj(pObj))
       return -1;
-    }
-    if (!bExistInMap) {
-      m_pDocument->ReleaseIndirectObject(objnum);
-    }
+    if (!bExistInMap)
+      m_pDocument->DeleteIndirectObject(objnum);
   } else {
     uint8_t* pBuffer;
     uint32_t size;